The Skates US Drill Bit Extension provides an easy way to Drill the Sole of the Boot, while positioning an Ice Blade on the Sole. This keeps the Drill Chuck from nicking the Blade runner edges. The Extension will accommodate the 2.0mm or the US 5/64″ Drill bit use for Mounting the Ice Blades.
2.0mm for Ice Screws
2.5mm for Roller and Revolution Blade Screws