This package includes 1,000 #8 X 1/2" self-piercing/zip screws with a modified truss head and a clear zinc finish. The screws are made of steel and have a Phillips drive type, with a thread size of 15. The item length is 1/2 in. and the screw size is #8. The model is HPHMTSPS 8X1/2-1000 and the brand is GB. The system of measurement is inch and the head style is modified truss head. The number in pack is 1,000. This item falls under the category of business and industrial, as well as fasteners and hardware, specifically screws and bolts.