There is no comparison when it comes Glastar's grinding heads. They outperform and outlast most other heads. The secret is their unique diamond bonding that eliminates peeling, creating a uniform surface that lasts.
Coarse 60 Grit is designed to work with the Glastar G8 grinder. One inch diameter bits do not "bite" into the glass quite as much as 3/4" diameter bits, creating straighter edges and gentler curves.Made with a patented diamond bonding process for extra long life. For rapid grinding, use this coarse 60 mesh grit bit.