Proto Square Drive Adapters, 1/2" (female square); 3/8" (male square) drive, 1 3/8" (577-5254)
$10.63
Chrome-plated, corrosion-resistant finish. Locking ball mechanism. Tool Type: Adapter/Extension; Head Type: 3/8" Male -- 1/2" Female; Material(s): Steel; Finish: Chrome.