Features and Benefits: Chrome vanadium sockets with S-2 Alloy bits ; Anodized aluminum holder with magnetic insert sticks to most ferrous surfaces ; Magnetic base ; Includes 1/4" dr. T10, T15,T20, T25, T27, and T30 bits; 3/8" dr. T40, T45, T47, and T50 bits; and 1/2" dr. T60 bit.