SharkBite Stainless Steel PEX Cinch Clamp, 1 In., 10-Pack. This clamp is designed for connecting PEX tubing and barbed PEX fittings, creating solid and leak-proof connections in seconds. It is made from durable stainless steel and meets ASTM F-2098 standards. To use, simply tighten the clamp ring using a PEX clamp tool (True Value # 608-743).