KO-KEN QUICK RELEASE RATCHET Ko-ken ratchets are known for their very low backlash, small head sizes, and high torque ranges.  We designed the new 72 tooth ratchet without compromising on our traditional strengths.  The patented design of the 72T combines the low backlash, small size, and has a 10% higher torque limit 1/4" Body 3/8" Sq. Dr. Ratchet Handle 72 teeth Flexible Head Length 160mm Quick Release Z-series