Typically makers use manganese phosphate as an intrusive rustproof treatment that blacken ratchets without changing size of 72-teeth ratchet on wrenches. However, to produce colored ratchet wrenches, manufacturers usually use titanium-coating or electrophoretic composite coating, which will increase outer film thickness on ratchets to undermine torque strength. Different from other players in the field, we have sophisticated, patented know-how to tear off the film on the 72-teeth ratchets to produce appealing, colored ratchet wrenches meeting DIN and ANSI standards, which effectively enhance product competitiveness.
