TEKTON 3/8 in. Drive x 5/8 in. 12-Point Impact Socket SID12216 - The Home Depot

TEKTON short arm L-keys have 1 ball-end arm that's the same length as our normal keys, and 1 flat-end short arm that's markedly shorter than our regular keys. This shorter arm allows the key to fit into tighter spaces where a regular-sized key cannot. The short arm L-keys are made from 8660 nickel chromium molybdenum steel that's heat-treated to 54-58 HRC and coated with a highly corrosion-resistant manganese phosphate finish. With the exception of the smallest sizes that are too small to mark, each key has a high-visibility laser marking and a stamped marking that won't rub off