Features ALUMINUM ALLOY - The main body of the feather board is made of excellent aluminum alloy, with anodized oxide finish, CNC processing, rust and corrosion resistance. Shock Absorption Flexible PU wheels increase friction, ensuring good shock absorption effect, preventing board deflection and ensuring more stable propulsion. Standard Guide Rail - The guide rail of the table saw press can be used for 30 or 45 standard slots, or it can be replaced with a small slider, fixed on the back of the T-slot or bracket. Adjustable Height The height of the feather board can be flexibly adjusted according to the thickness of the wood, only need to be installed in the duct or T-slot. ACCESSORIES INCLUDED - This kit includes a feed guide rail, 2 T-shaped sliding blocks, 2 T-shaped screws and 2 fixing rods, with a simple structure that is easy to assemble and use. Specification: Item Type: Table Saw Roller Material: aluminium alloy. Package List: 1 x Press Roller 2 x T-slide blocks. 2 x Fixed hand wheels 2 x T-bolts. 2 x Sliding bars. Package List 1 x Press Roller 2 x T Slider Blocks 2 x Fixed Hand Wheels 2 x T Screws 2 x Slider Bars