Single Flute edge chamfer 90 Degree Heat treated & tempered high-carbon steel with Titanium Nitrate coating for superior cutting power Use on steel, aluminum & other metals, plastic or wood Enlarge or countersink holes, deburr edges; 15-degree chamfer Specification: Material: Three-Pointed Woodworking Countersink Drill Bit?high-speed steel 4241 Woodworking Chamfer: shigh-speed steel #45 Surface treatment: Natural Color Handle features: Round Handle Dimension: 3mm(Dia) x 60mm(L) 4mm (Dia)x 75mm(L) 5mm(Dia) x 85mm(L) 6mm (Dia)x 93mm(L) 7mm(Dia) x 103mm(L) 8mm (Dia)x 107mm(L) 10mm(Dia) x 120mm(L) Package Included: 7 x Woodworking chamfer 1 x L-wrench How to Use Woodworking Countersink Drill Bit? ?Attach to any Power Bench or Hand drill driver. ?When Woodworking or Building Molding, enlarge and bevel the rim of a drilled hole so that a screw, nail, or bolt can be inserted flush with the surface you are working on. ?Example: Hinges - the bits also wipe away any burr left from any application, thereby improving the finish and removing hazardous edges. ? Special Note? ?The best use of this product is to use a bench drill, because the hand electric drill is not fixed in the operation process, the drill bit (especially the 3mm and 4mm) is prone to bend and break!!! ?Try to keep the drill vertical while drilling, so as not to be uneven.
? Tri-bit design: Three-Pointed design can quickly and accurately drill a smooth hole. Five-edged chamfer design will fast discharge chips from the hole on both sides automatically.
? High carbon steel material:The countersink drill bit is made of high carbon steel material with titanium nitrate coating. High hardness, durable and offer superior cutting power.
? User-friendly Design: Use the hex key to remove five-bevel chamfer or adjust counter sleeve depth and drilling depth for screws of various lengths.
? Extremely Versatile: The Countersink Drill Bit Set is includes 1 piece of hex key and 7 pieces of countersink drill bit in 7 different sizes to satisfy all you demand.
? Multipurpose: Perfect for wood, fiberboard, particleboard, plywood, plastic, PVC, rubber etc. Suitable for bench drill, hand drill and conventional electric drill.