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Address
304 North Cardinal
St. Dorchester Center, MA 02124
Work Hours
Monday to Friday: 7AM - 7PM
Weekend: 10AM - 5PM
Whether you need speed, clean chamfers, or longer tool life, choose the right angle, the right shank, and the right material.
You will see budget HSS sets for wood and light metal, 82 degree hex shank kits for flat head screws, and tougher cobalt or nitrided options for harder work.
Some kits swap fast, others adjust for precision, and the best choice depends on what you are drilling next.
More Details on Our Top Picks
Budget Pick
View Latest PriceIf you want a budget pick for clean chamfers, this 4 piece HSS countersink set is a solid option. It includes 4241 high speed steel, a round shank, and four sizes: 2 to 5 mm, 5 to 10 mm, 10 to 15 mm, and 15 to 20 mm. Use it on metal, wood, and plastic, but keep plastic hardness under 25 degrees. The 90 degree point angle helps you cut precise chamfers and deburr circular apertures or cone holes. For best results, mount it in a bench drill. A hand drill can shake and weaken the finish.
Quick-Change Pro
View Latest PriceDEWALT’s DW2702 is a quick-change solution for anyone who wants faster drill-to-drive swaps. You get a #10 drill driver with one-step loading and one-handed release, so you can move from drilling to driving without slowing down. Its complete unit design keeps parts together, which means you will not lose pieces on the job. The black oxide split-point bits start on contact and use a 118-degree tip for clean results. With a 5/16-inch hex shank, easy grip, and 1.6-ounce build, you can handle wood, metal, plastic, and more with confidence.
GMTOOLS’s 5-piece set delivers strong value for DIYers and professionals who need multiple countersink sizes. You get 1/4, 3/8, 1/2, 5/8, and 3/4 inch bits, all made from industrial-grade HSS with a black oxide finish. The 82 degree, 5 flute design helps you cut more smoothly, clear chips better, and reduce vibration. Its 1/4 inch hex shank fits handheld and stationary drills with less slip. You can use it on wood, plywood, plastics, mild steel, and fiberglass. For metal chamfering, pre punch holes first.
Best For Wood
View Latest PriceThis 5-piece, 82-degree hex-shank set suits woodworkers who want clean, flush screw seating. You get sharp, durable bits that cut with less resistance and leave smoother chamfers in wood, plastic, metal, and composites. The 5-flute design clears chips fast, so you can drill cleaner countersinks and seat fasteners neatly. Use the quick-change hex shank in most drills and drivers, and match one of the five sizes to your project. A pilot hole helps you stay precise, and going slow gives a smooth finish.
Most Versatile
View Latest PriceNeed one set that handles drilling and countersinking across metal, wood, and plastic? Choose THINKWORK’s W6172 10-piece set. It includes 5 step drill bits and 5 countersink bits, made from alloy steel with an HSS nitriding finish for durability. The four-flute step design improves stability, reduces deflection, and helps you drill faster with cleaner results. Laser-etched sizes make selection easy, and the straight shank provides solid control. It covers thin metal, aluminum, copper, iron, stainless steel, wood, and plastic, all packed in a handy toolbox.
Best Storage
View Latest PriceShould you work across wood, metal, and plastic, this 5-piece set keeps every bit organized. You get five sizes, 1/4″, 3/8″, 1/2″, 5/8″, and 3/4″, with a precisely ground 82-degree tip for clean, accurate countersinks. The five sharp flutes cut fast and leave smooth screw recesses in woodworking, metal projects, and general DIY tasks. The 1/4″ hex shank fits handheld drills, impact drivers, and drill presses without chuck adjustments. A compact molded case stores each bit securely, and high-speed steel adds durability. Use cutting oil after each job.
Woodworking Kit
View Latest PriceDIYSELF’s woodworking kit is a practical choice if you want clean countersinks and concealed screw holes in one setup. It includes a 15-piece set with common screw sizes, plug cutters, depth stop rings, Phillips bits, an Allen key, and an extension shaft. M2 cobalt steel helps keep cuts stable and smooth, while the adjustable collar lets you drill repeatable depths without slipping. The sharp tapered bits work on hardwood, softwood, MDF, plywood, plastics, and soft metals, leaving burr-free chamfers and flush screw heads. You can use it with impact drivers, drills, or drill presses.
Best Angle
View Latest PriceFor precise 60 degree chamfers, this 32 mm HSS countersink delivers the correct angle. It features an 8 flute straight design that helps clear chips well and keeps the cutting edges sharper for longer. The high speed steel body provides hardness, toughness, and wear resistance, so you can work confidently on wood, plastic, aluminum board, PCB board, and alloy steel surfaces. Its round shank fits many toolholding systems, and the 32 mm cutting diameter handles clean chamfered edge holes quickly. Supplied as one piece per pack, it is a practical addition to your kit for accurate, repeatable results.
Fastest Chip Removal
View Latest PriceThe 5-piece HSS countersink set delivers fast chip removal and clean, flush holes. It includes five sizes, 1/4, 5/16, 3/8, 1/2, and 3/4 inch, so you can handle pilot holes, countersinking, and hardware work with one set. The premium HSS construction resists heat and stays sharp, while the precision-ground 82-degree angle fits flat-head screws for a flush finish in wood, metal, and plastic. The 5-flute design reduces clogging, and the 1/4-inch hex shank swaps quickly in cordless drills and drivers.
Adjustable Depth
View Latest PriceFive depth settings make this adjustable depth countersink set ideal when you need precise, clean wood holes. It offers High Speed Steel durability, strong abrasion resistance, and sharper cutting with wider flutes that clear chips quickly. Two chamfered flutes speed drilling, while the detachable M2 pilot bit helps you make accurate pilot holes with a tight screw fit. You can drill, countersink, and counterbore in one step for 82° woodworking screws. The 1/4″ hex shank fits most quick change drills, and the five sizes cover common tasks.
When choosing a combined drill countersink, first check the angle and chamfer size so the fit matches your project. You should also confirm shank compatibility, as well as the material and coating for durability. Finally, consider the flute design, your application, and the drill type to make sure it cuts cleanly and runs efficiently.
Angle and chamfer size matter because they determine how well the screw head seats and how clean the finished opening looks. Match the countersink angle to your screw and material. 60 degrees, 82 degrees, 90 degrees, and 118 degrees each serve different chamfer profiles. For most flat head screws, 82 degrees gives you a reliable flush fit in wood, metal, and plastic. When you need a wider, more precise chamfer, 90 degrees works well for finishing circular openings. Size matters too. Larger cutters, such as 32 mm or 3/4 inch, remove more material for bigger recessed areas, while 1/4 inch or 2 to 5 mm sizes suit smaller holes. Always pair the chamfer size with the pilot hole and fastener diameter so you avoid overcutting and keep the surface neat.
Shank type compatibility matters because your countersink has to fit your tool chuck securely. Match the shank style to your drill or driver, whether that is a 1/4 inch hex, 5/16 inch hex, or round shank. If the shape is wrong, the chuck cannot clamp it firmly, and the bit might slip or wobble. Hex shanks usually work best with quick change chucks and impact drivers because they swap fast and hold well. Round shanks suit drill chucks that can grip cylindrical bits all around, though they are slower to change. You also need to check shank size, not just shape, since a near match still will not fit properly if the diameter or hex size is off. A secure fit reduces vibration and helps you cut cleaner chamfers.
Once you have matched the shank to your chuck, the next thing to check is the material and coating, since both have a major effect on how long the combined drill countersink will last. Choose high-speed steel, or HSS, if you want solid hardness, wear resistance, and heat tolerance for repeated drilling and countersinking. For general use in wood, plastic, and softer metals, a quality HSS bit with a protective finish usually gives you the best balance of value and longevity. If you are working on metal, choose a hard, wear-resistant coating such as black oxide, nitriding, or titanium nitride to reduce friction, resist corrosion, and slow blunting. For tougher jobs, industrial-grade or alloy-steel construction provides extra durability and better cutting stability.
Flute design plays a big role in how well a combined drill countersink clears chips and cuts cleanly. You will usually get better chip evacuation if the tool has more flutes because they help carry swarf away and reduce clogging. That means less heat buildup, less tear-out, and smoother countersinks. Wider or well-shaped flutes can move debris out faster, so you keep a steadier cutting speed and cleaner hole walls. Straight flute designs often improve stability and help debris leave the cut more easily. Efficient flute geometry also reduces vibration and lowers resistance, which can improve finish quality in harder materials. By keeping the cutting edges cooler and less prone to dulling, a smart flute pattern can also extend tool life and keep performance consistent longer.
When choosing a combined drill countersink, start by matching it to the material you will drill, because some bits are made for wood, plastic, and soft metals, while others also handle aluminum, brass, cast iron, stainless steel, or PCB board. Next, verify the drill type it supports. A bit may work well in handheld drills, impact drivers, electric screwdrivers, drill presses, and bench drills, or it may need a bench drill for best results. Check the shank style and size too. A 1/4-inch hex shank suits quick-change chucks, while a round shank fits broader holders. Finally, choose the design for drilling, chamfering, or both. Use the recommended setup, since handheld drills can shake and reduce chamfer quality compared with stationary drilling.