4 cutting edges carbide drill bit 1/12 taper, long skirt

Drilling tool with 4 cutting edges
Version long skirt model “FORT” with 4 massive carbide inserts

Material: granite, limestone, concrete

Use : with a rod, 1/12 taperd connection (in drilling range), with fittings: 19×50, CP9G, 22×82 and 22×108

Sharpening tips : see notice