The TC Clamp will fasten from 2in OD to 1.5in OD tube. The TC Clamp has a 2-1/2in T-handle so no tools are required to fasten to the pipe. 1.25in × 1/2in-13 TPI Grade 8 fastener, Nylock Nut and 1in diameter Belleville Spring washer are provided for connecting your load. Dimensions: 4-5/8in Tx 4inW x 1-3/16in thick. Safe Vertical Working Load 450 Pounds, (200 KG). Weight is 1.22 pounds (.55 KG)