YOUHENG Stainless Steel Coupler Lock Parameter (Specification）

YOUHENG Stainless Steel Coupler Lock Feature And Application
Receiver lock provides added security and theft deterrence while towing
1/2 in. trailer hitch locking pin is rated up to 3,500 lbs (Class I and II), 5/8 in. trailer hitch locking pin is rated up to 10,000 lbs (Class III and IV)
Locking head rotates 360 degrees allowing keyway to conveniently face forward; receiver lock features push-to-lock locking mechanism to ensure a secure lock every time; Push head firmly onto the pin and remove key
Snap-on cover provides weather resistance and prevents dirt and moisture from entering keyway, four-pin cylinder for added security to prevent lock picking
5/8 in. (16 mm) Diameter pin fits 2 in. (51 mm) Receiver Tubes, Class III/IV; 1/2 in. (13 mm) Diameter pin fits 1-1/4 in. (32 mm) Receiver tubes, Class II; Usable length of each chrome hitch pin lock is 2-3/4 in. (70 mm)
YOUHENG Stainless Steel Coupler Lock Details
Full length pin made of solid forged machined stainless steel.
Dual lock lug design. 
No internal springs to seize up or break.   
Knurling on lock heads adds style and grip.
A coupler is the forward most part of a trailer tongue that envelopes and secures to the tow vehicle hitch ball. The lever on the coupler both allows the ball to be received into the coupler and prevents the ball from being removed.Accordingly, a coupler lever lock prevents the lever from moving into the open position.
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