Depth Gauge is compatible with Husqvarna 5056981-01N design, compatible with 3/8" specification, 73LP, 73VL (H42 series) chains. When using, scrape off the protruding part of the depth gauge with a flat file. Find a cutting tooth on the chain and the depth limit tooth in front of it, then place it horizontally on the chain, and the two small slots next to it should be firmly pressed on the metal behind the cutting tooth. Chain saw depth gauge is suitable for forestry operations, gardening pruning, logging operations, etc. When using, the depth gauge can be adjusted according to the hardness of the wood being used. It can be adjusted to 0.04 inches (0.9 mm); and 0.03 inches (0.7 mm). Made of wear-resistant metal, with silver coating on the surface, it has good corrosion resistance and strength, suitable for use in various harsh working environments. This product is used to measure and adjust the height of the block (Raker) of the chain saw chain to ensure uniform cutting depth and improve sawing efficiency and safety., Manufacturer: LT Easiyl