Dottie Machine screw kit includes 110 assorted 1/4-20 Phillips/slotted round head machine screws, in 1/2-Inch thru 2-Inch, 30 x 1/2-Inch, 25 x 3/4-Inch, 20 x 1-Inch, 15 x 1-1/4-Inch, 10 x 1-1/2-Inch and 10 x 2-Inch sizes. The screw has steel construction with zinc plated finish, for durability and corrosion resistance.