Features: Precisions engineered alloys steel outer clamp washer ensures a stronge blade grip, solve slippage issue, for DCS390, S391, 373, 565 circularsaw for seamlessly cutting operations. Features without tool installation with a reinforced flange design, achieving secure blade alignment quickly while maintaining compliant safety standards. Ideal for professional woodworking, construction worker, and woodworking enthusiasts requiring reliable power tool accessories for heavy duty applications. Perfect for woodshop projects, concrete formwork trimming, and jobsites renovations where frequent blade changes demand quality circularsaw replacement parts. This machined bolt kit delivers vibration resistant performances across softwood, hardwood, and composite metal cutting tasks. Specifications: Component: Steel Color: As pictures shown. Size: Washer: 3.6cm/1.42in, Bolt: 1.79x1.79x1.87cm/0.70x0.70x0.74in Package Includes: 1pc Washer and 1pc Bolt note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.