The 20-pc 1/4" Drive Short Hex Driver Set, No. HA20S, from GripEdge Tools,features a Rounding Prevention Technology (R.P.T.) and a patented bi-directional geometry that prevents rounding, ensuring reliable performance. The set includes sizes from 1.5mm to 7mm and 1/6" to 9/32". Each socket features clear-size markings and nickel chrome plating for corrosion resistance, all housed in a case with a removable foam insert.