Nylon Retainers,Black,1 1/16 In. L,PK25, System of Measurement Inch, Shank Diameter 0.25 in, Overall Length 1 1/4 in, Shank Type Ribbed, Material Nylon, Head Type Dome, Head Height 0.188 in, Head Diameter 1 in, Color Black, Maximum Hole Diameter 0.25 in, Maximum Material Thickness 4/5 in, Product Type Push-In Rivet, Minimum Material Thickness 5/64 in, Manufacturer Location Globally Sourced, Body Length 1 1/16 in, Material Grade/Class Ungraded, Package Quantity 25 The ribbed shanks on these rivets are angled to allow easy insertion while preventing backouts. They help provide superior binding capabilities for soft materials with larger head dia. and interlocking gripper teeth.