Easy to use and install: The product design is convenient for users to operate and install. This is a manufacturer's product, not an original equipment part number accessory; however, the quality meets or exceeds part number manufacturing requirements, ensuring high quality and reliable durability. High-quality materials: Our tool parts are made of premium materials to ensure durability and performance. No matter what challenges you face, these accessories can withstand rigorous use. Product Name: Circular Saw Blade Hex Bolt Part Number: 266133-3 Fitment: Compatible with 4101RH, 4105KB, BSS610 models Application: Circular saw blade clamp Note: Installation guide not included. Professional installation is strongly recommended. Please verify the item thoroughly to ensure it meets your requirements. Tips: Product may vary slightly between batches. Actual product may have minor differences in appearance or color due to production updates. These variations do not affect functionality. Please verify the following when purchasing: 1. Part number 2. Shape, size, and appearance 3. Compatibility information 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: Lighting and display settings may cause slight color differences between the image and the actual item. Measurement error allowance is +/- 1-3 cm.