Weiler Tiger aluminum oxide 7 inch type 28 depressed center grinding wheels deliver the right combination of performance and value when grinding steel and other metals. This depressed center wheel with a concave "or saucer" shape is designed for increased aggression at lower working angles and increased access. The 1/4" wheel thickness is ideal for heavy stock removal, scale removal, weld removal, weld blending, edge beveling and torch-cut softening with a right angle grinder. The 5/8" - 11 nutted metal hub allows for quick spin-on, spin-off changeover and eliminates cross-threading or sticking to spindle due to heat build-up. This versatile grinding wheel leverages a strong bond that offers a long life solution for all your general purpose applications at an excellent total cost of use.