Product Description M-LOK Hardware includes one screw and one t-nut. Screw is 3/8" long and has a 1/8" hex head. These are designed to fit VZ's Inter-Lok (standard thickness) rail panels. M-LOK Screw and T-Nut (3/8th Inch) at VZ Grips $3.50 Buy Now Check Price on Amazon Check Price on eBay