1 Chrome JinHo locking Machine head, RIGHT side Small Knob
JINHO SP-locking used Jinho's special housing and ratio 1:19 gear for product differentiation. Also conform rately trend, add some parts for the least shaking, and for better quality, jinho use three different height of shaft. Especially, Jinho SP-locking is in a body with head and screw pin and it's that solved hanging pin problem of other company products. JINHO SP-locking has two different kind of head.
See pictures for mesurements