Includes four M2, M3, M4, M5 screws for most common projects Screw Type: Socket Head (TX), Flange & Fully Threaded (Head to Head) Drive Type : Allen key; Head Style: Button; Material: alloy steel 10.9 Package content: 1125 screws; round head. Product name: Screws round head A nice, well-kept category. Nuts and washers are stored in a box for easy access