Ko-Ken KO3305A32 12-Point Deep Socket, 1 in, 3/8 in Drive

The Ko-Ken 3305A is a 12-point deep socket with a 3/8 in square drive.

Sizes run from 1/4 to 1 in.

Lengths are 55 and 65 mm. (manufacturer-stated)

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

Where this product is used

• Turning inch nuts and bolts with a 3/8 in drive ratchet or handle
• Nuts on long studs and recessed fasteners where a standard socket will not reach
• General workshop and maintenance fastening

Features

• 3/8 in square drive
• 12-point (bi-hexagon) opening (manufacturer-stated)
• Deep body (manufacturer-stated)

Key specifications

Lengths and weights are manufacturer-stated (Ko-ken catalogue 2025-26). A dash means the figure is not published on this page.

Selecting the right option

Match the 3/8 in square drive to your ratchet or handle, then choose the size that fits the fastener. Choose the deep series when a standard socket will not reach the fastener, for example a nut on a long stud. The catalogue prints one dimension table for the 6-point and 12-point series (3305A and 3300A), so the lengths and weights shown here are the figures printed for both. (manufacturer-stated) The catalogue's safety notes say to select impact sockets only for electric or air impact wrenches and not to substitute hand sockets for impact sockets; this series is listed in the hand sockets section of the catalogue. (manufacturer-stated)

Related products

Related Ko-Ken products: Ko-Ken 3300A 6-Point Deep Socket, Inch Sizes, 3/8 in Drive, Ko-Ken 3305M 12-Point Deep Socket, Metric Sizes, 3/8 in Drive, Ko-Ken 3400A 6-Point Socket, Inch Sizes, 3/8 in Drive, Ko-Ken 3405A and 3405W 12-Point Socket, Inch and Whitworth Sizes, 3/8 in Drive and Ko-Ken 3000-60 Phillips Bit Socket, 3/8 in Drive.