OEM: 503717901, 503 71 79-01, compatible with Husqvarna, compatible with Jonsered 42, 242, 141, 136, 51, 55, 61, 254 and other models. One-button start and stop control, quickly control the switch state of the chainsaw, safe operation, and improve work efficiency. Built-in spring structure ensures sensitivity, made of durable plastic and conductive copper parts, heat-resistant, drop-resistant, and long life. Suitable for a variety of working environments, whether it is forestry logging, gardening pruning or woodworking processing. Package includes: 2x chain saw stop switch., Weight: 0.0440924524 Pounds, Manufacturer: OTOTEC