The Milwaukee 6 In. Guide Bar is to be used with the Milwaukee M12 Fuel Hatchet 6 In. Pruning Saw (2527-20). The bar length is 6 In., the pitch is 3/8 In. Low Profile, and the gauge is .043 In. The Narrow Kerf Design delivers maximum efficiency for longer run-time. The bar has a durable design and is weather resistant for increased life.