Industrial-grade standard block with high-precision linear bearing. Surface silver plating provides anti-rust protection and durability, with hardness up to HRC62. Adjusting handle allows control over slider tightness. Standardized processing ensures accurate guide rail positioning. Suitable for DIY CNC routers, mills, and lathes. Aluminum alloy support rail with pre-drilled holes for easy mounting. Type: Linear slide guide Glide path: Linear guide Rated dynamic load: 860 Rated static load: 1370 Precision grade: H Fixed bolt size: 8 mm Sliding block fixation mode: Locking type Allowable static torque: 1 kN·m Weight: 1050g Color: Silver Material: Metal Size: Linear Slide Rails - 500mm / 19.7inch (Length) x 12mm / 0.47inch (Diameter); Linear Bearing Side Blocks - 40mm x 40mm x 28mm / 1.57 x 1.57 x 1.10inch (Length x Width x Height) Package Contents: 1 x Linear guide 2 x Linear bearing slider Note: Light and display differences may cause slight color variation between image and actual item. Measurement error allowed is +/- 1-3cm.