Ko-Ken KO4405W08 12-Point Whitworth Socket, 1/4 Whitworth, 1/2 in Drive

The Ko-Ken 4405W is a 12-point Whitworth socket with a 1/2 in square drive.

Sizes run from 1/8 to 3/4 Whitworth.

Lengths are 37 to 47 mm. (manufacturer-stated)

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

Where this product is used

• Turning Whitworth nuts and bolts with a 1/2 in drive ratchet or handle
• Workshop, maintenance and assembly work on exposed fasteners
• General workshop and maintenance fastening

Features

• 1/2 in square drive
• 12-point (bi-hexagon) opening (manufacturer-stated)
• Whitworth sizes are given as the W designations (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 1/2 in square drive to your ratchet or handle, then choose the size that fits the fastener. The catalogue prints one dimension table for the 6-point and 12-point series (4405W and 4400W), so the lengths and weights shown here are the figures printed for both. (manufacturer-stated) The catalogue prints a BS to W conversion chart under the table, and the sizes in the Whitworth series are the W designations. (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 4405A 12-Point Socket, Inch Sizes, 1/2 in Drive, Ko-Ken 4405M 12-Point Socket, Metric Sizes, 1/2 in Drive, Ko-Ken 4305A 12-Point Deep Socket, Inch Sizes, 1/2 in Drive, Ko-Ken 4305M 12-Point Deep Socket, Metric Sizes, 1/2 in Drive and Ko-Ken 3000-60 Phillips Bit Socket, 3/8 in Drive.