Self centering drill bits makes it easy and convenient when installing any plates to get centered guide hole. They deliver clean and accurate holes for screws, that decrease the chance of a misaligned screw. Self-centering drill bit assorted set includes no.6 (3/32inch), no.8 (7/64inch) and no.10 (1/8inch) shanks, replacement for drill bit set were made to fit 1/4 In. drills. Note: Please check your accessory model, drill model to the compatibility. Hinge drill bit is quick and easy to install, change bits without re-chucking. It can be used for drilling pilot holes, installing hinges, strike plates and other hardware. The center finding bit uses a steel housing loaded spring design to guide the drill to the center of the hole, increasing while improving drilling accuracy. Hole drill bits are made of high-quality hardened steel, which is wear-, tough and has a strong enough plunge function to keep the drill bits centered. Item Name: Self Centering Drill Bits Hinge sighting drill bit helps you improve the accuracy of tightening screws and eliminates the headache of misaligned screw holes, making installing hardware much easier. The hinge drill set is available in three different sizes, there is no need to carry out tedious measuring and positioning steps, just choose the right size, and even a novice can quickly drill the perfect hole. High-quality materials and a design allow the plunge function of the center finding bit to be firm enough to keep the bit centered, yet soft enough that it didn't pull the painted off the mounting plate you were installing. Colour:As Shown Material:High Speed Steel Package Contents: 1 set x Hole Centering Drill Bits Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.