Features: Engineered with precise 19mm diameter nonslip positioning pins, these aluminum alloy stop blocks ensures accurate drilling alignment for woodworking projects while eliminating workpiece slippage. The reinforced clamp combines aluminum construction with anti skid pad, providing 50kg load bearing capacity for secure materials fixation during planing or jointing operations. Ideal for professional carpentry and DIYer enthusiasts requiring reliabled workbench auxiliary tools for furniture assembly, cabinetry construction, and precise woodcraft projects. Perfectly adapts to standard 15-20mm bench dog holes, serving as essential workshop equipment for tabletop routing, sanding operations, and complex joinery tasks requiring multi angled clamping. Featuring tool less installation and universally compatibility across woodworking benches, these corrosions resistant stop blocks optimize workflow efficiency while maintaining dimensional stability through prolonged heavy duty use. Specifications: Component: Alloy Size: Approx.19.2x3.9x0.8cm/Size: Approx.7.55x1.53x0.31inch Type: 19MM/20mm Applicable scenarios: Woodworking Package Includes: 12 Piece Woodworking Bench Clamps note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.