Tungsten steel blade: tungsten steel blade specifically for the word light slotting machine, specifically open the word precision stainless steel word around the edge, the slot must be at 1000 rev / min about the speed, or knife edge is easy to collapse collapse, collapse Not good repair, it is best equipped with depth adjustable slotting machine, both to protect the blade, but also to protect equipment and materials! Tungsten steel blade diameter 9.8cm, diameter 2cm, ordinary angle grinder can be used!