Fine tooth palm control ratchets combine 72 tooth mechanism and compact head to make tight work spaces accessible. Torque is transferred through 17 teeth during use, with each tooth bearing only 6% of drive load. Thumbwheel reversing mechanism enables easy one-handed direction change while free-wheeling back plate allows applications of steadying pressure without accidental reversing. Driver versions are offered in 1/4, 3/8, and 1/2 in. Three-piece set is available.