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 5 PK Grinding Wheels Type 27 – Zirconia 7″ x 1/4″ x 7/8 – 24 Grit $79.26 Part Number: 12642Add to Cart 25 PK | Depressed Center Type 27 Grinding Wheels for use on Masonry 4.5″x 1/4″ x 7/8 $89.73 Part Number: 12745Add to Cart Depressed Center Type 27 Grinding Wheels for use on Masonry 4″x 1/4″ x 5/8 $3.74 Part Number: 12742Add to Cart 25 PK | 5″ Type 27 Aluminum Oxide Grinding Wheels Depressed Center – No Hub – 24 Grit – 5″ x 1/4″ x 7/8″ $110.83 Part Number: 12737Add to Cart