720 Piece lock washer kit contains 6 popular sizes which are: (50) #6, (50) #8, (50) #10, (40) 1/4", (30) 5/16", (20) 3/8" lock washers; (50) #6, (50) #8, (50) #10, (40) 1/4", (30) 5/16", (20) 3/8" outer star washers, (50) #6, (50) #8, (50) #10, (40) 1/4", (30) 5/16", (20) 3/8" inner star washers.