I also bought a timberline chainsaw sharpener with 7/32" Carbide Cutter reading this source 1 Best Chainsaw Sharpeners to Buy in May 2 19: Top Choices Reviewed A simple turn of the crank will move the chain through the stones, easily cutting them down for any chain with a 30-degree angle.Lets hope it lasts for longer period,It has a other version also with 3/16'' it depends on type of your needs.