The Rapid waterproof rivets are ideal for use in humid areas. They are made from high grade aluminium and the head of the rivet is made of 1 single part to prevent leakage between the 2 parts when they are fixed together. The rivets are ideal for applications that require a waterproof fixing, such as on waterspouts, gutters, shower panels and greenhouses. Each pack is supplied with a drill bit. Specifications: Size: 4.8 x 14mm. Grip range: 8-11mm. Pack: Blister of 50. RPD5000402