Ko-Ken KO18316M3820 Impact Rear Wheel Nut Socket, 38 x 20 mm, 1 in Drive

The Ko-Ken 18316M is an impact rear wheel nut socket with a 1 in drive. The 38 x 20 mm model is a two-size socket, 108 mm long (manufacturer-stated). The catalogue does not say which size is at which end.

The 1 in drive is printed in the page heading of the Ko-ken 2021 impact catalogue; the 2025-26 catalogue page does not print a drive size or a point count (manufacturer-stated).

The catalogue lists it on its impact page.

Where this product is used

• Removing and fitting rear wheel nuts with an impact wrench
• Heavy vehicle and plant tyre and wheel work
• Tyre and wheel service work

Features

• 38 x 20 mm two-size socket
• 1 in drive (manufacturer-stated)
• 108 mm long (manufacturer-stated)
• Listed on the impact page of the catalogue (manufacturer-stated)

Key specifications

Selecting the right option

Check both nut sizes (38 and 20 mm) against your wheel before ordering. The catalogue's safety notes say to select impact sockets only for electric or air impact wrenches, to wear safety goggles when using nut runners or impact wrenches, never to substitute a hand socket for an impact socket, and to replace sockets with cracked walls, battered points or other marks of wear (manufacturer-stated).

Related products

Related Ko-Ken products: Ko-Ken 16316M and 16317M Impact Rear Wheel Nut Socket, 17 to 41 mm, 3/4 in Drive, Ko-Ken 18102M Extra Long Wheel Nut Socket, 23 to 41 mm, 1 in Drive, Ko-Ken PS6 Rear Wheel Nut Socket, 17 to 21 mm, 3/4 in Drive and Ko-Ken 16102M Extra Long Wheel Nut Socket, 24 to 41 mm, 3/4 in Drive.