Fed. Spec: ANSI B107.10M Features • Ball and spring socket retention. • Williams 1/2" Drive Ratchets Feature: • Ultra-fine 60 tooth model offers 6° tooth action in a narrow pear head • Unique Finger-Fit handles to provide a comfortable, non-slip grip and extra turning power. • Choice of 38-tooth quick-release or 60-tooth ultra-fine gear. • Narrow pear-shaped heads for access into confined work areas. • High-polished chrome finish for easy cleaning. • Unique combination 3/8" x 1/2" drive flex handle offers convenience of both drive sizes on one handle.