Ko-Ken KO2763028 Wobble-Fix Extension Bar, 1/4 in drive, 28 mm

Ko-Ken 2763, 3763 and 4763 are Wobble-Fix extension bars with square drives of 1/4 in, 3/8 in and 1/2 in. (manufacturer-stated)

Lengths are 28 to 400 mm. (manufacturer-stated)

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

Where this product is used

• Reaching fasteners recessed below the surface beyond the depth of a socket
• Providing clearance between the drive handle and nearby obstructions
• Extending square drive sockets in engine bays, machinery and assemblies

Features

• Square drives: 1/4 in, 3/8 in and 1/2 in (manufacturer-stated)
• Wobble-Fix: works as a flexible extension bar giving 15 degree angle operation, or as a normal extension bar (patented) (manufacturer-stated)
• 6-point knurling on the outside of the female square drive gives a grip for the fingers and stops the bar rolling on flat surfaces (manufacturer-stated)
• Listed in the Hand Sockets section of the catalogue (manufacturer-stated)

Key specifications

Drive sizes, lengths and weights are manufacturer-stated (Ko-ken catalogue 2025-26).

Selecting the right option

Match the square drive to your sockets and handle, and choose the length for the reach you need. The catalogue notes that using several short extensions in place of one correctly sized bar should be avoided. The Wobble-Fix extension bar has less strength than a normal extension bar because of its specific design with a reduced square drive, so use it correctly. (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 PK4763/5 Wobble-Fix Extension Bar Set, 5 Pieces, 1/2 in Drive, Ko-Ken PK2763/6 Wobble-Fix Extension Bar Set, 6 Pieces, 1/4 in Drive, Ko-Ken PK3763/6 Wobble-Fix Extension Bar Set, 6 Pieces, 3/8 in Drive, Ko-Ken 2760Z, 3760Z and 4760Z Z-Series Extension Bar, 1/4, 3/8 and 1/2 in Drive and Ko-Ken 2760, 3760, 4760, 6760 and 8760 Extension Bar, 1/4, 3/8, 1/2, 3/4 and 1 in Drive.