1/2" - 1" Rebar Ground ClampRebar Ground Clamp, Direct Burial, Clamp Material: Bronze, Screw Material: Stainless Steel, Wire Range: 8 AWG (Solid) 4 0 AWG (Stranded) Copper Wire, Pipe Size: 1 2" 1". Rebar: 3 8" 1", Suitable for: Rebar, Water, Pipe, Copper Tubing and Ground Rod NSI has many well respected brands, including Bridgeport Fittings, Polaris, TORK, and WarriorWrap, and were still growing. Also known as: 662381005564, GLC 140DB, NSIGLC140DB, Burke clamps