Great White Lab Series Features: •10X increased durability and longevity with extremely hard cutting surface of 2,800 Vickers •Abrasion resistance reduces surface heat and vibration for a cooler, more consistent surface finish. •Comprehensive selection of shapes, sizes and grits, manufactured with tungsten carbide heads and stainless steel shanks. Material and Usage: Plaster and Stone - Trim Acrylic - Trim Specs: Shank: HP Head Length: 13 Head Diameter: 070 Multi-Use: Yes ISO Shape: 143 Series: G ISO Grit: 215 HP Number: 500 104 143 215 070 Color Band: Green Max Speed: 20,000 Pack Size: 1 Each