Shoulder screws are a type of fastener used in many types of lawn and garden equipment. Also called stripper bolts or shoulder bolts, they have a head, threads, and an unthreaded shoulder. These screws are used in areas where items need to be held together in a specific location. They can be used with bearings, bushings, and machinery support. Shoulder screws are made of durable metal but can still experience breakage or damage. When this occurs, the screws will need to be replaced. A wrench can be used to remove the damaged shoulder screw. First, visually inspect the shoulder screw to look for damage or corrosion. Sometimes, the screw will be entirely broken. If any of these things are present, a wrench can be used to remove the old shoulder screw. The same tool can be used to insert a new shoulder screw before reassembling the equipment.Designed for lawnmowers, lawn tractors, tillers, leaf blowers, chainsaws, log splitters, chipper shredders, and snowblowers, this part is compatible with items from Yard Machines, MTD, Cub Cadet, Craftsman, Toro, Huskee, Montgomery Wards, Yard-Man, MasterCut, and Troy-Bilt. The locknut is sold separately.