Made of 18-8 stainless steel, polished. Excellent for stowing fishing rods, boat hooks, oars, swab, broom, flashlight, flagstaff, pump etc. No. 502 DP1 adjusts from 5/8" to 1-1/4", 502 DP2 adjusts from 1" to 1-3/4". Both models are for No. 6 fasteners, and are skin packaged in pairs.