Lead screw guide rail kit material: carbon steel; durable and flexible. Smooth carbon steel rod: linear guide shaft with a precision optical axis; widely used in linear motion systems. Common uses include stamping machines, tool grinders, automatic cutting machines, printers, card sorting machines, food packaging machines, and other sliding components in industrial machinery. The lead screw in the guide rail kit is easy to install, user-friendly, and requires no special handling. Package contents: - 1 x chrome-plated rod, 200 or 285 mm long - 1 x SCS8LUU linear bearing block - 2 x aluminum end supports (SHF8 or SK8) Guide rail sets with lead screws are simple to install and easy to use, with no special handling required. Use scenarios: - Precise positioning in printers and card sorting systems - Linear motion in stamping, tool grinding, and automatic cutting machines - Inline motion for conveyor and packaging equipment in food processing and related industries