• Rox Wood 0086 Self-Centering Bit Handle Drill Bit Set 7 Pieces No displacement, the sawdust will be automatically discharged from the top of the hole on both sides, the drill bit will not be clogged. It references the hinge holes itself and the hole is opened straight to the counterbore without making a right or left. The hinge allows you to drill vertically without slipping in places that require flat drilling, such as drawer rails, so that the screws fit flat to the counterbore. Maktkap TipSize Inch Maktkap TipSize Metric Length5/64 '' 2mm 87mm7/64 '' 2.8mm 88mm9/64 '' 3.5mm 96mm11/64 '' 4.5mm 97mm5mm 5mm 108mm13/64 '' 5.2mm 109mm1/4 '' 6.35mm 112mm