Easy to use and install: The product design allows for convenient installation and operation. This is a manufacturer's product, not an OEM Part Number part or accessory, but the quality meets OEM manufacturing requirements, ensuring high quality and reliable durability. High-quality materials: Our tool parts are made of high-quality steel to ensure durability and long service life. These accessories can withstand demanding conditions. 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 details to ensure compatibility before purchase. Tips: Product may vary slightly due to different production batches, including minor appearance or color differences, which 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 Bolts Package includes only the items listed above; other products are not included. Note: Lighting and display settings may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3 cm.