Diamond nail drill bit for pedicure, "Twister", 10*17.8 mm, Blue

Diamond nail drill bit for pedicure is used to treat the skin of the feet from calluses and corns, small and deeper cracks. The large working part has holes that promote cooling during operation. 

Head diameter 10 mm. 
Working part 17.8 mm. 
Form "Twister". 
Fine grit "Blue"