Check the listing for details. 5-PACK CHAINSAW SHARPENING STONE 3/16" THREADED GRANBERG FOR .325 PITCH CHAIN. Condition: New. Listed at 15.98 USD. 5-Pack of Archer Professional Chainsaw sharpening stones. The stones are size 3/16" and this size is normally used to sharpen .325 pitch chainsaw chain.These stones are High Quality and designed for rotary sharpeners that us both a smooth 1/8" shank and threaded ends. These grinding stones also work on Oregon, Craftsman, Dremel, Wen, Sure Sharp, Poulan and Grandberg sharpeners. THREADED ENDS USED ON GRANBERG and Stihl hand held grinders. Many users try to push down or apply pressure, this can cause pre-mature failure of the stones. These grinding stones should be used with a back and forth sliding motion just like when filing with a round chainsaw file. Do not apply pressure when sharpening. These stones work great when used with KOOL-GRIND lubricant, please see our listing number 382773899787. KOOL-GRIND lubricant coats and lubricates the grinding stone, preventing clogging and glazing, it also reduces heat and friction to produce a cooler and a slower grind which reduces the chance of "burning" the cutter. It also improves the life of the stones. Archer Guide Bars, Archer Chainsaw Chain and Archer Chainsaw Accessories are sold world wide and are known for quality products!