Made of high-speed steel, to be used with Impact Drivers and Wrenches. Includes 8 each #2 Phillip's 1 in insert bits, #2 Phillips 1 in drywall reduced diameter insert bits, 1 each impact ready 3/8 in drive 9/16 in deep socket, 1/4 in impact ready nutdrivers, 5/16 in impact ready nut drivers 3/8 in impact ready socket adapter, impact ready 3/8 in drive 3/8 in deep socket, impact ready 3/8 in drive 7/16 deep socket, impact ready 3/8 in drive 1/2 in deep socket, impact ready pivoting it tip holder, 3 in impact ready 3 in stainless steel bit tip holder with hog ring.