PRECISE POSITIONING: No displacement, sawdust will be automatically discharged from top of hole on both sides, drill bit will not be blocked.
7 DIFFERENT SIZE: Come with most common hinge screw sizes 5/64", 7/64", 9/64", 11/64", 13/64", 5mm, 1/4".
AUTOMATICAL DISCHARGE: Sawdust will be automatically discharged from the top of the holes on both sides, without drill blocked. Never miss the center of the hole again, references from the hinge bevels.
EASY TO REPLACE: Different hardness wood, need different centering drill, you just need take the screw apart and replace the drill.
EASY TO INSTALL: Unique design and perfect punch effect. Applicable for the installation of the door hinge. Easy to use and install, change bits fast which one-handed load and release.