When cutting acrylics and plastics, "chip-welding" – A melting of the material is a concern. But not with these non-melt blades. With a modified triple-chip grind and a 2° negative hook angle, They produce less heat than a standard blade, leaving a crisp and smooth edge., #LB86401C, (D) diameter: 8 (200mm), teeth: 64, (D) bore: 5/8, tooth grind: m-tcg, hook angle: -2°, kerf (B): .098 (2.5mm), Plate (C): .070 (1.8mm), LB86401C electro-blue carbide Tipped non-melt plastic 8 inch dia X 64T m-tcg, -2 deg, 5/8 Bore, Non-Stick coated