The Ko-ken RS3305A/9 is a 9-piece 3/8" square drive deep chrome socket set featuring 12-point openings. The set covers SAE sizes from 1/4" to 3/4", specifically 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", and 3/4". Each deep socket is mounted on a 200mm rail for organized storage and easy access. Ideal for demanding tasks, this set offers enhanced grip and durability for efficient performance.