Easy to use and install: The product is designed for convenient use and installation. This is a manufacturer's product, not an OEM Part Number part or accessory, but the quality meets OEM manufacturing requirements, providing high quality and reliable durability. High-quality materials: Our tool parts are made of high-quality materials to ensure durability. No matter what challenges you face, these accessories can stand the test. Product Name: Circular Saw Blade Hex Bolt Part Number: 266133-3 Fitment: for 4101RH, 4105KB, BSS610 Circular Saw Blade Hex Bolt Application: Circular Saw Blade Clamp Note: Installation guide not included; professional installation is strongly recommended. Please check carefully to ensure the item is what you need. Tips: The product may be updated due to different batches. The actual product may have slight differences or color variations, which do not affect functionality. Please verify the following when purchasing: 1. Part number 2. Shape and size 3. Compatibility table Color: Black Material: Steel Package Contents: 4 x Circular Saw Blade Hex Bolt Package includes only the items listed above; other products are not included. Note: Light reflection and different display settings may cause the color in the image to vary slightly from the actual item. Measurement error allowed is +/- 1-3 cm.