WLMW5218 Features: -Kit contains 12 popular sizes.-Kit comes in a convenient re-sealable plastic case.-Kit contains both Lock washers and Flat washers. Specifications: -720 Piece washer kit.-Made for shop and home useThis 720 piece washer kit contains 12 popular sizes , which are (50) #6, (50)#8, (50) #10, (40) 1/4", (30) 5/16", (20) 3/8" Lock washers and (100) #6, (100) #8, (100) #10, (80) 1/4", (60) 5/16", (40) 3/8" Flat washers..-720 Piece Washer Hardware Kit. Warranty: -Lifetime warranty does not cover abuse.