Contents: 25 of each Countersunk head - Slotted + Nuts and Washers: M3 x 8, M3 x 16, M4 x 8, M4 x 16, M4 x 20, M5 x 8, M5 x 16. Cheese head - Slotted + Nuts and Washers: M3 x 6, M3 x 12, M3 x 25, M4 x 8, M4 x 6, M4 x 12, M4 x 25, M5 x 6, M5 x 12, M5 x 25.