Manufacturer Frank A. Edmunds Co. Manufacturer part number 5618KNOB GTIN 715627156183 Availability Frank A. Edmunds Frame And Floor Stand Plastic Tension Knobs-4/Pkg 4/PKG -PLASTIC TENSION KNOB Old price: $4.83 Price: $3.68 Qty: Add to cart Add to compare list Add to Wishes-N-Wants View These plastic tension knobs replace the wing nuts that come in our hardware bags. They come in a set of four and make it easier to tighten the carriage bolts on all Edmunds frames and floor stands. Does not work on the Edmunds Handi-Clamp line of scroll frames. This package contains 4 plastic knobs. Made in the USA.