Ko-Ken KO8866A Square Drive Adaptor, 1 in female x 3/4 in male

Ko-Ken 3322A, 4433A and 8866A are square drive adaptors.

Lengths are 24, 35 and 60 mm. (manufacturer-stated)

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

Where this product is used

• Using a socket with a handle of a different square drive size
• Workshop and maintenance work where the right-sized handle is not to hand
• General fastener work with sockets and handles of different drive sizes

Features

• Square drive sizes: 3/8 in female x 1/4 in male, 1/2 in female x 3/8 in male and 1 in female x 3/4 in male

Key specifications

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

Selecting the right option

Check the square drive sizes at each end against your handle and socket. The catalogue warns that adapting down from a larger square drive to a smaller one may lead to excessive torque and possibly cause breakage. Always stay within the safe torque of the smaller drive. (manufacturer-stated)

Related products

Related Ko-Ken products: Ko-Ken 2755, 3755, 4755 and 6755 Ratchet Adaptor, 1/4, 3/8, 1/2 and 3/4 in Drive, Ko-Ken 14433A, 14466A, 16644A and 18866A Impact Square Drive Adaptor, Ko-Ken 14433A-B and 14466A-B Impact Ball Type Adaptor and Ko-Ken 2760, 3760, 4760, 6760 and 8760 Extension Bar, 1/4, 3/8, 1/2, 3/4 and 1 in Drive.