The same quality material and strength of the square, aluminum support plate, just a little easy to install-no indexing.
The round aluminum supports plates are available in 5/16" x 1-3/8" thread in quantities of 24, 96, 144 and 1,008- The largest diameter round aluminum backing plate on the market
- 1 3/8in. diameter plate works with 5/16in. studs
- The largest diameter round aluminum backing plate on the market
- 1 3/8in. diameter plate works with 5/16in. studs