full selection of machine screws comes organized in a handy PVC storage case with an included index chart for easy selection. The machine screws feature pan-head Phillips drives and are constructed of stainless steel to resist rust and corrosion. Good for a wide range of general-purpose applications, these machine screws are a great addition to any tool kit! Stainless steel construction Rust- and corrosion-resistant Pan-head Phillips drive Twelve: 6-32 x 1/2 in.; Ten: 8-32 x 1/2 in.; Ten: 8-32 x 3/4 in.; Ten: 10-24 x 3/4 in.; Ten: 1/4-20 x3/4 in.; Five: 1/4-20 X 1 in.