TSV 7Pcs HSS Door Self-centering Hinge Hole Opening Drill Bit Set Twist Wood Bit 5/64'', 7/64'',9/64'', 11/64'', 13/64'' ,1/4'', 5mmCategory: Bell Hanger Bit WoodTSV TSV 7PCS Self Centering Door Lock Cabinet Hinge Drill Bits Set PilotHole Saw Tool. WOWParts team offers 30 days return or replacement qualitywarranty lifetime technical supports. Please contact us freely if you needanyfurhter assistance.SpecificationType: Hinge Hardware Drill Material: Brass + high-speed steel All Shank Size: 1/4inch(6.35mm) Dimensions: 5/64inch, 7/64inch, 9/64inch, 11/64inch,13/64inch, 5mm, 1/4inch Net Weight: 7.4oz(210g) Color: SilverDescriptionOur hinge bit set is perfect for pre-drillinghinges for screws. Great for interior and exterior doors. The spring loadedguide centers the built-in drill bit inside the holes of a door hinge, cabinethinge, bracket, or other hardware that requires a centered pilot hole.FeaturesPrecise Positioning: Drill bush for precisepositioning, will not move. High speed steel body designed, durable,rustproof and excellent for use. Sawdust Discharged from Hole: Sawdust will beautomatically 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 puncheffect. Applicable for the installation of the door hinge. Easy to useand install, change bits fast which one-handed load and release. The bits are surrounded by spring loadedguides that have a window to show the drill bit depth while makingadjustments. They come in the 3 most common hinge screwsizes 7/6inch, 9/6inch, 11/64inch. The 7/64inch is good for drilling holes insmaller hinges and hardware like decorative boxes. The 9/64inch is ideal for medium to full sizehinges and hardware. The 11/64inch is perfect for door hinges, gatelocks and all large hardware.NotePlease adjust according to the hardness of thewood, 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 about2.2-2.8mm tapping screw. 7/64inch: Hole diameter is about 2.8mm, useabout 3-3.5mm tapping screw. 9/64inch: Hole diameter is about 3.5mm, useabout 4-4.5mm tapping screw. 11/64inch: Hole diameter is about 4.5mm, useabout 5-5.5mm tapping screw. 5mm: Hole diameter is about 5mm, use about5.5-6mm tapping screw. 13/64inch: Hole diameter is about 5.2mm, useabout 6-6.5mm tapping screw. 1/4inch: Hole diameter is about 6.35mm, use about7-7.5mm tapping screw.Package Includes7 x Hinge Hardware Drill.