Larger item in the picture shows spring clip for round tubing. It must be used with a leveler glide as shown in the lower left corner of the picture. It cannot be used alone. Below are clips with a 1/4-20 hole thread. The below 1/4-20 thread clips adapt to LA10625, LA17525P, SLA12525, SLA12525P, FG2005, and LA2145.