Features: Available in 3 different sizes for Chainsaws (5/32"/4.0mm), Small Chainsaws (3/16"/4.8mm) and Large Chainsaws (7/32"/5.5mm), they can meet your daily needs. They are high hardness, wear resistance, strong toughness, corrosion resistance; Suitable for metal polishing, woodworking,etc; It has good grinding effect,hard and not easy to wear; Diamond Chainsaw Sharpener Size: 5/32inch/ 4.0mm; 3/16inch /4.8mm; 7/32inch /5.5mm;(Optional) Specifications: Material:Metal Diamond Chainsaw Sharpener Size: 5/32inch/ 4.0mm; 3/16inch /4.8mm; 7/32inch /5.5mm;(Optional) 5/32"/4.0mm Parameter: Grinding head Length:approx.20.5mm/0.81in Grinding head Diameter:approx.4mm/0.16in Shank Diameter:approx.3mm/0.12in Total Length:approx.48mm/1.89in Applicable chain: for Electric saw small 8chains; 3/16" /4.8mm Parameter: Grinding head Length:approx.22.5mm/0.89in Grinding head Diameter:approx.3/16"(4.8mm) Shank Diameter:approx.3mm/0.12in Total Length:approx.48mm/1.89in Applicable chain: for 325Electric saw, big 8chains; 7/32"/5.5mm Parameter: Grinding head Length:approx.23.5mm/0.93in Grinding head Diameter:approx.7/32"(5.5mm)； Shank Diameter:approx.3mm/0.12in Total Length:approx.48mm/1.89in Applicable chain: for 404Electric saw chains; Package Includes: 6xChainsaw Sharpener note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.