Sapphire #305, Small Round Inverted Taper
Sapphire #305, Small Round Inverted TaperSapphire Carvers - coarse grade; longer lasting than rubies. They can used to carve, grind, texture, or smooth. They are durable , long lasting, precise and easy to control.
3/16" head diameter x 5/16" head length, 3/32" shank and 1-3/4" long.
30,000 RPM Maximum Speed.