A set of impact quality 1/4" square drive sockets in single hex (6pt) profile. Covers smaller sizes from 4mm to 15mm, including some useful half sizes. Allows the use of impact tools with smaller nuts and bolts. Ideal for quick and easy removal of rusted components and a time saver when there are a lot of fixings. Provided on a socket rail for easy, accessible storage so the sockets are readily to hand. A good value, useful workshop set.