Kincrome 11 piece 1/4-3/8 Drive Blade head socket set. Packed on socket rail set is ideal for any application where a specific bit is required. Manufactured from heavy duty Chrome Vanadium Steel. Set contains 1/4 Drive 3, 4, 4.5, 5, 5.5, 6mm Blade and 3/8 Drive 6.5, 7, 8, 10, 12mm Blade.