WLMW5216 Features: -Flat and lock washers are made of stainless steel.-Kit contains 12 popular lock washers and flat washers.-Kit comes in a convenient re-sealable plastic case.-Kit contains a total of 350 pieces.-Great for the home or shop useThis 350 piece lock and washer kit contains 12 popular sizes, which are (50) #6, (40) #8, (30) #10, (25) 1/4", (15) 5/16", (15) 3/8" Lock washers and (50) #6, (40) #8, (30) #10, (25) 1/4", (15) 5/16", (15) 3/8" Flat washers..-350 Piece Lock and Flat Washer Hardware Kit. Warranty: -Lifetime warranty does not cover abuse.