The TC Clamp will fasten from 2" OD to 1.5" OD tube. The TC Clamp has a 2-1/2" T-handle so no tools are required to fasten to the pipe. 1.25 ~ 1/2"-13 TPI Grade 8 fastener, Nylock Nut and 1" diameter Belleville Spring washer are provided for connecting your load. Dimensions: 4-5/8" Tx 4"W x 1-3/16" thick.