Pro Tools Express Diamond Chainsaw Sharpener Burr 1/8" Shank - 4 Pack 4 Pack 5/32" - Total Length 1-3/4" * Head Length 3/4" * Shank Length 1" * Shank Diameter 1/8" 4 Pack 3/16" - Total Length 1-3/4" * Head Length 15/16" * Shank Length 13/16" * Shank Diameter 1/8" 4 Pack 7/32" - Total Length 1-3/4" * Head Length 15/16" * Shank Length 13/16" * Shank Diameter 1/8" Extend the life of your chainsaw & get easier cutting with properly sharpened chains Grit: 120-150