10pcs Hinge Center Positioning Bit Hinge Central Positioning Drill Combination Center Drill Bits Set with Hex Wrench

Features:
Accurate Positioning: the hinge bit positioning stably and accurately, the drill bit is located in the center of the hole and will not shift.
Reliable Quality: the center drill is made of high-speed steel that has high hardness and durable for using.
Double Groove Chip Removal: chips will automatic remove from both sides quickly, thus will not block the drill.
Drill Bit Replacement: fastly change bits by the included allen wrench, easy to use and install.
These hinge hole opener has excellent drilling performance that is applicable for the installation of the door hinge.