Product ID: Hob-01
The knurling die:
The knurling pattern with non-skid and attracting in appearance on manual tools (straight knurling pattern or diamond knurling pattern) by the knurling dies. The knurling pattern is formed by gear hobbing machine before the heat treatment process, the precision is less good as the grinding type, but, the straightness, and concertricity can be assured.
The following is to shown you the hobbing progress: