Requires use with MLG20 guide rail. MLG20-P55-40 Mounting Plate is optional (based on the application). Smooth and high precision movement with the unique mechanism called multi-roller. Please use with stoppers. Common applications include food processing equipment, gaming and vending machines, medical and analytical machines, factory automation. Recommended screw when used with MLG20-P55-40: M2.6 x 4 mm machine screw - low profile head