Use low speed when to start drilling, to the bit from being broken or 4 of the most often used sizes for carpenters, cabinet, furniture makers and other wood working tradesEasy to use and installPositioning accuracy, will not , the chips will automatic discharge from the hole on either side of the top of the drill, not stuck drillFEATURES：UNIQUE DESIGNHold the hardware right where you want itDURABLENote: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understanding.Get the drilling/installation task done with maximum efficiency while the risk of drilling off-center, causing an ugly installation at a skewed angle.POSITIONING Offers positioning accuracy without shifting to enhance work efficiency.DRILL EASIER AND FASTERIt has a double-sided hole that automatically discharges sawdust on both sides to clogging of the drill bit casing.Adjust the depth according to the hardness of the materialPress the self-centering bit into the countersink and get it perfectly vertical with the otherWIDE APPLICATION Suitable for accurately making holes for hinges, door putts, window pulls, window , door , striker plates, and all other hardware using screws.ADJUSTABLE DRILL DEPTH The bit includes a spring- drill guide to give you more control over your preferred drill depth.Quantity: 1 set(4pcs a set)Made from a hardened material that resists the wear and tear of repeated use.Material: High-speed steelColor: Sliver4 x Wood drill bit tools