PartsPuppy.com offers several different rivet sizes for several different vinyl strap attachment needs. Use a smooth shank rivet for most double wrap vinyl strap installation. The double wrap ensures that the rivet will not pop out and no barb is needed. A single wrap vinyl strap attachment needs the short shank rivet. It has a barb to snap in place. The long shank rivet can be used for slotted vinyl strap conversion.