Can effectively improved the drilling efficiency.Spring-loaded guide centering the built-in bit in the hole of the door hinge, cabinet hinge, bracket, or hardware where the center hole is required.Hinge for and windows hinge screw hole, positioning accuracy, will not shift, the sawdust from the drill hole on both sides of the top side of the automatic discharge will not stuck bit.There are 5mm and 1/4inch drill bits that you can for boring holes in different sizes, Hexagonal Design.Colour:blackMaterial:high speed steelPackage Contents:2 x Hinge Drill BitOnly 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.