The 6320 End Stop is used to retain carriers on the 6200 I Beam Track. The End Stops attach to the bottom of the I Beam Track with the included set screw. These End Stops can be positioned at any point along the length of the track. The hole on the flange allows a hook to be attached, allowing a curtain to remain at a fixed point on the track. .66 in x .51 in x 1.16 in. Mill aluminum finish - Silver. Sold in Pairs (Qty 2).