Size: 1/4 inch/6.3 mm. Total length: 42 mm/1.65 inch.
Material: The universal joint is made of 35k steel with chrome-plated surface, which has higher durability and corrosion resistance.
Omni-directional steering: Each adapter has two directions of rotation, allowing you to bypass any object with fasteners.
Purpose: The four positioning grooves at the drive end of the sleeve are firmly connected with the fixed ball of the drive tool. The sloped inner edge helps guide the sleeve to other tools.