4″ Type 27 Aluminum Oxide Grinding Wheels Depressed Center – Hubless, 24 Grit. 4″ x 1/4″ x 5/8″ – 25 pack.
Vitrified, aluminum oxide double fiberglass reinforced wheels designed for strength and cutting action when working on steel and non-ferous metals.
Use on angle head grinders. Comply with ANSI B7.1 regulations when in use. 13,700 RPM.