YOUHENG Red Trailer Hitch Lock Set Parameter (Specification)

YOUHENG Red Trailer Hitch Lock Set Feature And Application
- Constructed from heavy duty steel
 - Fully adjustable universal fit - Easy to fit 
- Resistant to rust and corrosion - Advanced looking mechanism for improved security 
- Easy and quick to install and remove
 - 12mm steel bar and durable steel body 
- Helps protect against tow away theft - Supplied with 2 keys
YOUHENG Red Trailer Hitch Lock Set Details
This coupler lock kit helps prevent your trailer and gear from being stolen when you're not using it. Simply insert the ball into your coupler, connect the shackle, and lock it down. Also includes locking hitch pin and padlock-style coupler lock.

Features:
Trailer coupler lock:
Protects your trailer from being stolen when it's not in tow
Ball fits most 1-7/8", 2", and 2-5/16" ball couplers
Multiple locking positions accommodate most coupler contours and latches
Fits surge-marine couplers, latch-style couplers, and couplers with an extra ring
Spring-loaded lock automatically returns key to locked position
Bright red shackle provides a visible theft deterrent
Durable steel construction with corrosion-resistant chrome finish
Bent-pin-style trailer hitch receiver with lock:
Used in place of standard pin and clip to prevent theft of ball mount or hitch-mounted accessory
Secures your bike rack, cargo carrier, hitch cover and other accessories to your trailer hitch
Solid steel pin with chrome plating is corrosion resistant
Plastic cap covers key slot to help prevent corrosion in the locking mechanism
Padlock-style coupler lock:
Secures your ball mount or hitch accessory
Pin lets lock fit most couplers
Brass construction with chrome-plating is corrosion resistant
4 Square keys included

Specs:
Trailer coupler application: 1-7/8", 2", and 2-5/16" couplers
Coupler shackle diameter: 1/4"
Coupler span: 1-1/2"
Weight: 2.5 lbs

Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) 
The color of the actual items may slightly different from the listing images due to different computer screen, thanks for your understanding. 
 Instruction is not included
Package included: 1 X Lock 2 X Keys