100-pc Pop Rivet Set, Aluminum Heads with Steel Shafts, Includes 4 Most Popular Sizes Includes: 20-pcs (1/8" x 7/32") Includes: 30-pcs (5/32" x 7/32") Includes: 30-pcs (1/8" x 5/16") Includes: 20-pcs (3/16" x 5/16") Aluminum heads w/steel shafts