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 Asst contains 25 pieces each of: M3 x 0.5mm by 3mm, 6mm, and 10mm; M4 x 0.7mm by 4mm, 6mm, and 10mm; M5 x 0.8mm by 5mm, 8mm, and 12mm; M6 x 1.0mm by 6mm, 8mm, and 10mm; and M8 x 1.25mm by 8mm, 12mm, and 16mm.