Allstar ALL18095 Black 1/16" to 3/8" Range Multi-Grip Style Large Head Rivet with Steel Mandrel, (Pack of 250) Large head rivets have a steel mandrel Black finish on the rivet head Rivets are multi-grip style and have a 1/16 inch to 3/8 inch range Sold as one set of 250 pieces It has a 90 day limited warranty