Durability Metal Construction: Made from metal with Precisely threading for smooth adjustments, resistant to stripping, deformation, and long term wear Rust Resistant & Outdoor Ready: Treated to withstand humid and dusty conditions, ideal for forestry, yard work, and other demanding outdoor tasks Cost Effective Replacement: Serves as reliability spare part for damaged tensioning screws, eliminating the need for full chainsaw replacements and reducing maintenance costs Precisely Fit for Chainsaws: Specifically designed for 501537401, HUS395, 394XP, and 395XP models, ensuring direct replacement without modification for seamless installation Smooth Tension: Features finely machined threads for effortless chain tension control, slippage or excessive tightness during operate, Manufacturer: OSNIYAW