The RJC-1 clip is made for 14-18 gage steel z-girts. It is 1" wide x 3" long made from 24 gage galvanized tempered steel.

The "ski slope" design helps slide the clip onto the girt, and the tempered steel helps keep the clip tight. This may be applied to the girt before fastening to the studs, or after the insulation is placed on the wall.