550 Assorted Philips Self Tapping Screw Set is specially designed to be self-tapping. Just drill the correct size hole then screw in the screw. Includes handy carrying case for quick and convenient storage. Specially designed to be self-tapping. Includes handy carrying case for quick and convenient storage. Contains 550 Philips assorted sized self tapping screws. Sizes Included: 65pc 3x12mm, 55pc 3x16mm, 60pc 3.5x10, 65pc 3.5x12mm, 60pc 3.5x16mm, 45pc 3.5x20mm, 50pc 4x12mm, 40pc 4x16mm, 30pc 4x25mm, 20pc 4x30mm, 25pc 5x20mm, 20pc 5x25mm, 15pc 5x30mm. Brand: Toolzone. .