Home / Abrasives and Finishing Products / Surface Prep/Sanding / Grinding Wheels / 100 PK Depressed Center Type 27 Grinding Wheels – Hubless. 4″ X 1/4″ X 5/8″ 24 Grit 100 PK Depressed Center Type 27 Grinding Wheels – Hubless. 4″ X 1/4″ X 5/8″ 24 Grit $222.52 Part Number: SDP404-100 Vitrified, aluminum oxide double fiberglass reinforced wheels designed for strength and cutting action when working on steel and non-ferous metals. 100 PK Depressed Center Type 27 Grinding Wheels - Hubless. 4" X 1/4" X 5/8" 24 Grit quantity Add to cart UPC: 682488076786 Category: Grinding Wheels Tag: 4" x 1/4" x 5/8" Related products 1 PK Flexi-Wheels Type 27 – 4″ x 1/8″ x 5/8″ Flexi-Wheels 46 Grit $5.09 Part Number: 4046Add to Cart 10 PK 9″ Type 27 Aluminum Oxide Grinding Wheel – 1/4″ x 7/8, 24 Grit $105.54 Part Number: 12740Add to Cart 10 PK Grinding Wheels Type 27- Zirconia 9″x 1/4″ x 5/8-11NC – 24 Grit $242.59 Part Number: 12646Add to Cart 1 PK | 5″ Type 27 Aluminum Oxide Grinding Wheels Depressed Center – No Hub – 24 Grit – 5″ x 1/4″ x 7/8″ $5.07 Part Number: 12736Add to Cart