These socket adapters come in three popular size with square drive and ball-lockends which mate with socket drivers (1/4”, 3/8”, 1/2”). Adapters have 1/4” hex power bit shank. Overall length - 2”.

1/4"
MODEL: 77904
$2.44
3/8"
MODEL: 77906
$2.92
1/2"
MODEL: 77908
$4.13