PRECISE POSITIONING: Drill bush for precise positioning, will not move. High-speed steel body designed, durable 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. 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. MULTIFUNCTION: Get accurately centered holes for hinges, handles, drawer slides, etc. Applicable for the installation of the door hinge. COMMON SIZES: They come in the 3 most common hinge screw sizes 7/64", 9/64", 11/64". The 7/64" is good for drilling holes in smaller hinges and hardware like decorative boxes, 9/64" is ideal for medium to full-size hinges and hardware, 11/64 is perfect for door hinges, gate locks, and all large hardware. SPECIFICATION Material: High-Speed Steel All shank size: 1/4" Hole Size: 5/64", 7/64",9/64", 11/64" Usage instruction: The 7/64" is good for drilling holes in smaller hinges and hardware like decorative boxes. The 9/64" is ideal for medium to full-size hinges and hardware. The 11/64 is perfect for door hinges, gate locks, and all large hardware. Contact Options: Email: [email protected] (Best Option) Phone Number: 353 76 670 1268 / Dublin Address: 13 Adelaide Road, Dublin, Ireland D02 P950 / USA Head Office Address: 2232 Dell Range Blvd, Suite 245, Cheyenne, WY, USA 82009