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The Master Lock No. 3794DAT features a trailer coupler lock, receiver lock and trailer coupler latch lock. The trailer coupler lock fits 1-7/8in (48mm), 2in (51mm) and most 2-5/16in (59mm) couplers. The receiver lock includes the Push to Lock locking mechanism, easily used by pushing the lock body firmly onto the pin and removing the key. The Weather Tough seal and water tight cap provides additional protection from moisture and dirt. The coupler latch lock adjusts from 9/16in (14mm) to 2-3/4in (70mm) for added application flexibility. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.

Keyed Alike - One key opens all three locks. See details in the description field below.
We can not match two different lock sets to the same key number.
Coupler lock fits 1-7/8", 2" & 2-5/16" couplers.
Receiver lock comes with two pins, a standard 5/8" and a 1/2" pin for class I & II receivers having 1-1/4" wide tubes.
Stainless steel latch lock is a universal size, 9/32" diameter.
Keyed Alike - One key opens all three locks. See details in the description field below.
We can not match two different lock sets to the same key number.
Coupler lock fits 1-7/8", 2" & 2-5/16" couplers.
Receiver lock comes with two pins, a standard 5/8" and a 1/2" pin for class I & II receivers having 1-1/4" wide tubes.
Stainless steel latch lock is a universal size, 9/32" diameter.

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