1WEAR RESISTANT ALUMINUM ALLOY: This support bracket is made of aluminum alloy, possess good wear resistance, not easy to rust, high accuracy, strong bearing force, practical and long service life 2BRING HIGH ACCURACY ROTATION: High friction resistance allows high accuracy rotation in smooth motion, the ideal accessory to solve problems when used with linear circular rails 3WIDE APPLICATION: Widely used in plastic machinery industrial robots, fitness equipment, printers, woodworking machinery, firecrackers, etc. 4FOR MECHANICAL EQUIPMENT: Can be used for digital 3D coordinate measuring equipment in accurate equipment or special machinery industry 52PCS IN TOTAL: The package contain a total of 2pcs linear shaft holder, possess low noise, high speed, high accuracy and long life