Check the listing for details. Chain Saw Sharpening Grinding Stone Bit Unthreaded Dremel 453 454 455 - 6 pieces. Condition: New. Listed at 15.25 USD. Chainsaw Shapening Stones Dimensions--DRE 455:Bit Diameter mm:5.6 mmSize:7/32 inShank Diameter:0.125 (1/8")Material:Aluminum Oxide Abrasive Model Number:455Bit Diameter Inch:7/32"RPM:35000Suitable for 3/8" pitch chain saw DRE 454:Bit Diameter mm:4.8 mmRPM35000Model number454Material:Aluminum Oxide abrasive Bit Diameter Inch:3/16"Shank Diameter: Suitable for .325" pitch chainsaws0.125 (1/8") DRE 453: Bit Diameter mm:4.0 mmBit Diameter inches:5/32"Shank Diameter:0.125 (1/8")Material:Aluminum Oxide AbrasiveBit Diameter Inch:5/32"Model Number: Suitable for 1/4" pitch and 3/8”(LP)453 Low Profile (LP) pitch chain saws PRODUCT KEY FEATURES Package of 6 Chainsaw Sharpening bits Cut faster and safer with less strain on your chainsaw with a properly sharpened chain Precision ground abrasive stone for quick, easy sharpening of chain saw blades Made of fine aluminum oxide; the preferred industrial sharpening abrasive for hardened steel Unique diameters for repairing nicks, edge forming and honing to razor sharpness High-speed steel shanks fit all rotary tools, mini die-grinders or power drills Use lightly on chain when sharpening saw to retain shape Long Lasting WARNING--Please follow your tool safety instructions and wear safety glasses or protective gogglesall the time during operation. ANSI CertifiedPremium QualityMade in the USA