Premium quality drill bits for binding mounting from Wintersteiger. Bindings should be mounted by a qualified ski technician with the correct jig. This drill bit is 4.1mm diameter with a 7mm depth stop. Generally used for most alpine skis with a laminate layer, & as indicated on the ski requiring a 7mm depth. Contents: 1 drill bit Specification: 4.1mm diameter & 7mm deep drill bit Compatible with all ski binding mounting jigs.