High grade alloy steel metric set screws with hexagon recessed heads. Ends have cup points for positive torque. Handy kit for shop toolroom or toolbox. On hand when needed saves time and money. Plastic compartment box is easy to store. The Precision Brand 375-piece metric set screw Assortment contains 25-piece each of: M3x0.5 by 3 mm, 6 mm and 10 mm, M4x0.7 by 4 mm, 6 mm and 10 mm, M5x0.8 by 5 mm, 8 mm and 12 mm, M6x1 by 6 mm, 8 mm and 10 mm and M8x1.25 by 8 mm, 12 mm and 16 mm.