Matthews 18" Furniture Clamp with 5/8" Bar Clamp Adapter #429592

This is a furniture clamp with 5/8" bar clamp adapter. A rough adjustment is made by releasing the spring loaded lock and sliding the adjustable half of the clamp over the serrated bar. Final tightening is done with the worm screw handle. The bar clamp adapter slides over the bar and tightens with two thumb screws.