Metal Tech pig tail lock used for stacking both mason and arch scaffolding frames. No tools are necessary. Simply slide into the lower end of the scaffold frame and coupling pin to lock securely into place. High strength steel with a curved design to fit most standard tube sizes. Brand Name: Metal Tech Material: Steel Color: Silver Product Type: Scaffolding Pig Tail Lock Number in Package: 1 pk Weather Resistant: Yes Height: 1.5 in. Width: 2 in. Length: 3 in. OSHA Compliant: Yes CSA Certified: Yes ANSI Certified: Yes Finish: Galvanized Weight: 0.1 lb.