SEA-LECT Designs Dome-Head Tri-Fold Rivets provide an extremely secure, maintenance-free attachment for most accessories onto your watercraft. These lightweight, yet durable rivets allow for professional installation with long-lasting results. Hole size: 3/16. Grip range: 1/32-1/2. Set of 10 rivets. Cancer and Reproductive Harm- www.P65Warnings.ca.gov.