Blind rivet has 2 parts: the rivet and the mandrel. The rivet fa to the materials, and the mandrel is used to set the rivet and then is discarded. Blind rivets differ from solid rivets in their ability to be fully installed in a joint on just one side of a structure, where it is "blind" to the opposing side.Specification: Item: Blind RivetRivet Style: Blind RivetBlind Rivet Type: Open EndRivet Head Style: DomedRivet Body Material: AluminumMandrel Material: SteelRivet Dia.: 1/4 inRivet Length: 0.725 inGrip Range: 0.376 in to 0.5 inHead Dia.: 0.5 inHead Height: 0.069 inDrill Size: FHole Size: 0.257 to 0.261 inSingle Shear Strength (Lbs.): 600Tensile Strength (Lb.): 750Warning: California Residents: This product and/or packaging can expose you to chemicals including Styrene, which is known to the State of California to cause cancer and birth defects or other reproductive harm.