The Astro Tool 94409TS 9-Piece 3/8" Drive Nano Impact Triple Square Bit Sockets.
These sockets are lifetime warranty forged from S2 alloy uniquely treated to provide superior resistance to twisting and chipping compared to CR-V, CR-MO and even other S2 sets.
Larger sizes feature tamper proof design. This set includes the following: one aluminum socket holder rail and impact bit sockets in sizes M4, M5, M6, M8, M10, M12, MT14, MT16, MT18.