Ko-Ken KO4112N Attack Driver, 1/2 in Drive

Ko-Ken 3112N and 4112N are attack drivers with square drives of 3/8 in and 1/2 in.

Lengths are 159 and 163 mm. (manufacturer-stated)

Each model is listed in the table below with its specifications.

Where this product is used

• Loosening and tightening fasteners by striking the driver with a hammer, which converts the blow into a twisting force
• Maintenance and repair work where a fastener is tight and a normal handle will not move it
• Driving sockets and bit holders that fit the square drive

Features

• Square drive: 3/8 in and 1/2 in (manufacturer-stated)
• Black finished head, manganese phosphate treated so the chrome does not peel off when the head is struck (manufacturer-stated)
• Body shape gives a stronger grip and converts striking power into twisting power (manufacturer-stated)
• Special heat treatment against cracking: the striking head is slightly softer and the cam part is harder (manufacturer-stated)
• A strong spring converts striking power efficiently into twisting power (manufacturer-stated)

Common specifications

Key specifications

Lengths are manufacturer-stated (Ko-ken catalogue 2025-26).

Selecting the right option

Match the square drive to your sockets and bit holders.

Related products

Related Ko-Ken products: Ko-Ken 3112G and 4112G Attack Driver, 3/8 and 1/2 in Drive, Ko-Ken 2785 to 8785 Sliding T-Bar Handle, 1/4, 3/8, 1/2, 3/4 and 1 in Drive, Ko-Ken 4711XZ Z-Series Spinning Cross Wrench, 1/2 in Drive and Ko-Ken 2725Z, 3725Z and 4725Z Z-Series Reversible Ratchet, 1/4, 3/8 and 1/2 in Drive.