This universal 18 457mm chainsaw chain is designed to suit all chainsaws with the following specifications: nn- 18 457mm Bar n- 3/8LP Pitch n- 0.050 Gauge n- 60 Drive Linksnn - For optimum cutting performance of your chainsaw, it's recommended ton sharpen the chain every time that you refill the petrol tank 5/32 4.0mm file required for sharpening this chain.nnPowerFit chains suits many common chainsaws including Makita, Stihl, Ryobi, Ozito, Mc - Culloch & Husqvarna.nn - PLEASEn NOTE: 'PowerFit' is the new name for 'PreciseFit' accessories. It's a n - TTI brand the company that manufacture Milwaukee, AEG and Ryobi npower-tool products and is the brand name for their range of high quality power-tool accessories. nn - THE PRODUCT SUPPLIED MAY HAVE EITHER THE 'POWERFIT' OR THE 'PRECISEFIT' LOGO BUT WILL OTHERWISE BE EXACTLY THE SAME PRODUCTnn - Free insured courie