7PCS Self Centering Door Lock Cabinet Hinge Drill Bits Set Pilot Hole Saw Tool Fast shipping from CA !!! Product Description: High-speed Steel, with a brass body designed, durable and excellent for useGet accurately centered holes for hinges, handles, drawer slides, etcCan be used for carpenters, cabinet, furniture makers and other woodworking tradesEasy to use and install, change bits fast which one-handed load and release Our hinge bit set is perfect for pre-drilling hinges for screws. Great for interior and exterior windows and doors. The spring loaded guide centers the built-in drill bit inside the holes of a door hinge, cabinet hinge, bracket, or other hardware that requires a centered pilot hole. Product Features: 100% brand new and high quality.Precise Positioning: Drill bush for precise positioning, will not move. High speed steel body designed, durable, rustproof and excellent for use.Sawdust Discharged from Hole: Sawdust will be automatically discharged from the top of the holes on both sides, without drill blocked. Never miss the center of the hole again, references from the hinge bevels!Unique Design: Unique design and perfect punch effect. Applicable for the installation of the door hinge. Easy to use and install, change bits fast which one-handed load and release.The bits are surrounded by spring loaded guides that have a window to show the drill bit depth while making adjustments.They come in the 3 most common hinge screw sizes 7/6inch, 9/6inch, 11/64inch.The 7/64inch is good for drilling holes in smaller hinges and hardware like decorative boxes.The 9/64inch is ideal for medium to full size hinges and hardware.The 11/64inch is perfect for door hinges, gate locks and all large hardware. Note: Please adjust according to the hardness of the wood, if the wood is soft, choose a smaller size; If the wood is hard, you can choose a larger size or corresponding opening tool.5/64inch: Hole diameter is about 2mm, use about 2.2-2.8mm tapping screw.7/64inch: Hole diameter is about 2.8mm, use about 3-3.5mm tapping screw.9/64inch: Hole diameter is about 3.5mm, use about 4-4.5mm tapping screw.11/64inch: Hole diameter is about 4.5mm, use about 5-5.5mm tapping screw.5mm: Hole diameter is about 5mm, use about 5.5-6mm tapping screw.13/64inch: Hole diameter is about 5.2mm, use about 6-6.5mm tapping screw.1/4inch: Hole diameter is about 6.35mm, use about 7-7.5mm tapping screw. Product Specification: Device Type:Hinge Hardware DrillMaterial:Brass + high-speed steelAll Shank Size:1/4inch(6.35mm)Dimensions:5/64inch, 7/64inch, 9/64inch, 11/64inch, 13/64inch, 5mm, 1/4inchNet Weight:7.4oz(210g)ColorSilver Package Includes: 7 x Hinge Hardware Drill Powered by SoldEazy