[Three-tooth arc design cutter head]The cutter head adopts three-tooth arc design, which can be accurately positioned, with low cutting resistance and easy chip removal, which greatly improves the efficiency of woodworking drilling. [The drilling depth can be adjusted freely]The diameter of the bore is 35mm and the drilling depth can be adjusted by removing the depth adjusting fastener. The adjustment range of the drilling body is from 8mm to 30mm. [High quality material & centering tip]The head adopts a center-positioning tip design, which can cleanly cut through hole, which is very suitable for boring concealed hinges and door locks. The head is made of alloy steel and the handle is made of #45 steel, which is stronger, sharper and durable, . [Hexagonal handle design]Different from other Forstner Drill Bits, our Bits's handle adopt hexagon design so that the gripping force between the pistol drills etc and drills will be greater , less prone to slippage, which improves your work efficiency. In addition to 1 x 35mm Forstner Drill Bit+1 x Depth Adjustment Fastener, you can also get an additional Hex Key Wrench, which is convenient for you to remove the depth adjusting fastener to adjust the drilling depth. [Wide range of applications]Wide range of applications:Suitable for drill press, pistol drill, bench drill, vertical drilling machine, hand held electric drill, stand motor-driven drilling machine and mobile ribbon type magnetism drilling machine etc.you can also adjust the drilling depth by removing the depth adjusting fastener so that can be used for drilling of the wood of different thickness. Material:Cemented carbide colour:Orange+silver+black Package Contents: 1 x 35mm Forstner Drill Bit 1 x Hex Key Wrench