1. Distinguish from nail drill bit’s shankCheck whether the bottom of the drill bit shank has rounded corners and whether the bottom is smooth. If there are cutting marks, this shows that the work ...

1. Anti to acid and alkali, not easy to produce chemical changes in solvent.2. Turning and grinding is not easy to produce heat, low heat sense.3. It does not bounce off easily when throwing armour...

· Pure, durable, strong tungsten steel material · Fast and more efficient filing and removing acrylic· 3/32’’or 1/8’’ shank diameter can fit on your nail drill· High concentricity· Excellent heat d...