High quality: The hinged drill is made of super hard alloy, which cuts more sharply, has excellent drilling ability and can remove debris well. Features: The opening of the hinge hinge hole opener is 35mm. The special design of the removable depth limiter makes drilling easier. It can operate according to the center reference line and quickly locate the drilling center point of the hinge and mounting plate. Easy to use: The clamp drilling tool guide device hidden hinge can quickly locate the hinge center point, even if you are not a professional, you can quickly locate the hinge and the mounting plate drilling center point. fixed drilling: The drill group can be adjusted according to the changes of the door side, suitable for drilling hidden hinges and door locks. Wide range of uses: Suitable for drills, pistol drills, bench drills, vertical drills, vertical electric drills, movable magnetic drills, etc. Suitable for woodworking DIY or professional engineers. 1.The hole opener with depth limiter can be adjusted according to the changes of the door edge and can remove debris well. This is very suitable for hidden hinges and door locks. 2.When using, determine the position of the boring cup, with the short board facing upwards, fix the screw into the side of the board and drill the bore cup hole. Cannot be used to drill metal holes. Before drilling, make sure there are no nails or other metal objects on the wood to avoid damaging the drill bit. 3.The hinge hole opener suitable for drills such as bench drills, vertical drills, electric hand drills, impact drills and CNC engraving machines. Suitable for woodworking DIY or professional engineers. Specifications: Material: Alloy Hole: 35mm Color: Blue Package includes: 1 x 35mm hinge drilling template + drill bit set