The Fastgrip #10 Hi-Lo MINI-DRILLER has all of the specs that make the Fastgrip #10 Hi-Lo the go-to fastener, but with the added MINI-DRILLER point. The MINI-DRILLER makes easy work of driving through metal panels, while the Hi-Lo thread provides superior pull-out strength in metal to wood applications. 1/4″ Hex Head 250pcs/package Faster start time Increased performance when drilling through two layers of metal Reduces trapped steel shavings Mechanical Galvanized Hi-Lo threads 1/2″ galvanized EPDM bonded washer FOR PROPER APPLICATION, THE USE OF IMPACT DRIVERS ARE NOT RECOMMENDED ON ANY PAINTED FASTENERS. *Important note- All color names are generic names and may not match your specific panel manufacturer's color.