Master Lock 375DAT Class III/IV Snap-On Receiver Hitch Lock with 5/8-Inch Pin Review

After spending more than I care to mention on a bike rack and a hitch-mounted storage rack I felt I needed to protect them with a hitch lock.The Master Lock 375DAT is for a 2" receiver and replaces a 5/8" pin.I looked at a few bike and hardware stores and found it to be competitively priced on Amazon.It also appeared to be of better quality and lower price than some others I found at a hitch store as well. In assessing the lock I wanted to see how well it performed in three apsects:1) Fit and ease of putting through the hitch pin opening 2)Ease of locking and opening with hitch attachments on; and3)Did it make any noise or rattle.
Overall I was more than pleased with the lock.1) With regard to placement I was pleasantly surprised to find that it slid throughmy slightly rusty receiver hitch better than any of my existing pins.I think this was because it is a better quality SST than my other pins.I also found the locking mechanism to be easier to lock in place than the conventional pin.Since the locking head is symmetrical I did not have to worry about getting the hole lined up just perfect to insert a cotter pin (also minimized knuckle scraps). 2) It was also easier to mount my storage rack attachment since you approach the lock from the side rather than having toaddress the cotter pin through the attachment.I had also intended to use with my bike rack which is held in place with a bolt.I forgot the bolt is held in place with a nut welded to the inside of the receiver tube so the lock is unable to go through.Not the fault of the lock, just disappointing that I either have to keep using the bolt or somehow remove to enable the lock to pass through.3) I was a little concerned that there was some play in the lock and that it might create some noise.The play I noticed helps engage the key in the lock and does not appear to be a problem.
My only complaint is that I wish Amazon carried a version for my other car that has a 1 1/4" receiver which needs a 1/2" pin!

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Product Description:
Keep that unattended trailer locked and secure with this snap-on hitch lock from Master Lock. The unit features a 5/8-inch, bent pin that slides into the trailer's receiver tubes with ease. The pin attaches to the lock so it can't be removed without one of the two included keys. Fitting 2-inch square receiver tubes, the lock is protected from the elements by Master Lock's Weather Tough seal for years of reliable trailer security.A stainless steel body and solid brass cylinder core resist corrosion for smooth operation and optimal security. And, an attached, plastic lock cover keeps moisture and road debris out of the keyhole for added protection. This Class III/IV lock also features a precision pin tumbler mechanism that resists picking. The unit accepts K1 key blanks for making additional keys. --Brian D. Olson
What's in the Box
Lock, two keys

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