BIT EXTENSIONS *Sub Brand: SHOCKWAVE *Drive Type: Assorted *Length: 3 in. *Style: Impact Duty *Product Type: Magnetic Drive Guide and Bit Set *Material: Alloy Steel *Number in Package: 7 pc. *Packaging Type: Carded *Shank Diameter: 1/4 in.*Magnetic: Yes *Impact Rated: Yes *Shank Type: Hex Shank *Optimized shock zone absorbs peak torque and prevents breaking*Stainless steel sleeve extends for improved fastener stability*Laser etched depth gauge for increased fastener control*Magnet holds fasteners to the drive guide*C-ring retains the insert bit*Custom alloy 76 steel maximizes resistance to wear and shock *Discovery ACC, CON, NBR, SUP