With our Self-Centering Hinge Drill Bits Set, you will be able to drill perfectly centered holes easily and without removing the hinge! How many times have you ended up with off-centered holes while drilling through a metallic hole into the desired object? This drill bit is the solution. Simple but incredibly useful, this special self-centering drill bits are a must-have accessory for your drill if you're up to installing hinges to your doors or windows. Why You'll Love It Centered holes through hinges: To install a door hinge, normally you would place the hinge at the desired place, mark future holes, and then remove the hinge and drill the holes. However, as lengthy as this process is, it still doesn't guarantee perfectly centered holes. With this Self-Centering Hinge Drill Bits Set, you will drill perfectly centered holes without removing the hinge! No damage to hinges or bit: The conical end of each bit fixes itself to the hinge hole so that the bit may not move and damage itself or the hinge, which usually happens with normal drilling. Helps to drill the pilot hole: It also helps make one pilot hole, fit the screw, tighten it down the handle, and then drill the other holes to avoid the hinge movement during drilling. No mess: Sawdust is discharged on the sides of the drilled holes rather than entering the drill so there are no risks of a stuck drill. Features Ensure centered & accurate holes for drilling through hinges Perfect for both professional & domestic use Made of brass and high-speed steel Drill bits for hinges Package includes: 1 x Self-Centering Hinge Drill Bits Set