Replacement chainsaw loops with sharpening stones to fit the PowerSharp guide bar. No need to remove chain from the saw to sharpen; chain sharpens while mounted on the guide bar. Pitch: 3/8 In. (9.5mm). Guage: .050 In. (1.3mm). Depending on conditions, chain can be sharpened from 5 to 15 times. Precision sharpened loops