High QualityThe Hinge Drill Bit is Made of Cemented Carbide That Makes the Cutting Sharper, Lasting Durability, Unimpeded Chip Removal, and Has Excellent Boring Ability and Excellent Boring Performance. The Hinge Drill Bit Includes: 35mm(1-3/8") Double-edged DesignIt's Head Adopt Arc Curve Double-edged Design, Rapid Removal of Waste and That Make Sure Your Work with Efficiency. The Center Spur of Each Bit Guarantees Accurate Drilling and Prevents Walking and Wobbling During Operation, Create Perfectly Round and Accurate Holes with The Center Spur Design. DEPTH STOPER DESIGN A Depth Stop can be Fixed on the Shank Which Keeps You From Drilling too Deep, Limited Depth From 15mm to 40mm. You can also Remove the Stop for Unlimited Depth. WIDELY USEDSuitable 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. Can be used for wood products perforation, mounted spherical door shoot tip, drawer, plastic products, wood, plywood, etc.. EASY TO USEEasily and Conveniently Dip Cup Hole on the Wardrobe Door or Desk by Yourself With the Hinge Drilling Jig, Suitable for Their Own Home Operation, Even you are not a Professional, You can Quickly Locates Drill Center Points for Hinges and Mounting Plates.