The Log Wizard Chainsaw Bar is made with pre-drilled holes to mount the Log Wizard to your Stihl Chainsaw with the D025 mount pattern. The Bar will fit most common Stihl chainsaws including models 024, 026, 028, 030, 032, 034, 036, 038, 041, 042, 044, 056, 066, MS360, MS441, MS460, MS660. The 16" Professional Hard Nose chainsaw bar will run .050 gauge chain in both 3/8 pitch and .325 pitch. Cutterless chain for use with the Log Wizard is available separately. 66 Drive Link, 3/8 pitch cutterless chain and 75 Drive Link, .325 pitch cutterless chain are both compatible with this bar