Center Doors Self Centering Hinge Tapper Core Drill Bit Set Hole Puncher Woodworking Tools FEATURES： PRECISE POSITIONING Offers positioning accuracy without shifting to enhance work efficiency. UNIQUE DESIGN It has a double-sided hole that automatically discharges sawdust on both sides to prevent clogging of the drill bit casing. ADJUSTABLE DRILL DEPTH The bit includes a spring-loaded drill guide to give you more control over your preferred drill depth. DRILL EASIER AND FASTER Get the drilling/installation task done with maximum efficiency while preventing the risk of drilling off-center, causing an ugly installation at a skewed angle. DURABLE Made from a hardened material that resists the wear and tear of repeated use. WIDE APPLICATION Suitable for accurately making holes for hinges, door putts, window pulls, window latches, door bolts, striker plates, and all other hardware using screws. Hold the hardware right where you want it Press the self-centering bit into the countersink and get it perfectly vertical with the other Use low speed when to start drilling, to prevent the bit from being broken or jammed Adjust the depth according to the hardness of the material SPECIFICATION: 4 of the most often used sizes for carpenters, cabinet, furniture makers and other wood working trades Easy to use and install Positioning accuracy, will not shift, the chips will automatic discharge from the hole on either side of the top of the drill, not stuck drill Material: High-speed steel Color: Sliver Quantity: 1 set(4pcs a set) Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understanding. Package includes: 4 x Wood drill bit tools DURABLE UNIQUE DESIGN Easy to use and install 4 x Wood drill bit tools Hold the hardware right where you want it