Features:* & * The electric saw sharpening head is easy to install and has good heat dissipation. It can be applied to the polishing agent without removing the chain, thus improving work efficiency.* Use with an electric sharp handheld grinder for easy sharpening and chainsaw* The newest, hardest titanium diamond wheels we have ever produced have adopted a titanium coating process, which means you will enjoy 20% longer life of these bits than other non-titanium coated bits.* These stones leave an excellent cutting edge on the chainsaw and are easily replaceable on most electric chain sharpeners carder* Ideal for sharpening chainsaw teethSpecifications:Material: titanium coated emery grainSize: 4.0mm, 4.8mm, 5.5mm Shank: 3mmApplicable: these blade grinding heads electric saw are suitable for polishing metal, such as electric saw, jade, wood, mold, steel, etc. Package Contents:15 Pieces Diamond Chainsaw Sharpener