Are you searching for a larger peg? We're the only Australian company which stocks these colourful, practical and extra strong "ripper grippers" which fit rails of 33-40mm.
Originally designed for boat rails, the usage is only limited by your imagination, indoors or outdoors. Friends have told us they use them for pool fences, caravan trips, extra thick laundry items (e.g. dog rugs), holding car sunscreens in place, you name it!
The springs are industrial steel and the Super Jumbo model has a double spring for double strength.