2 Pack Square Pto Pin, Shaft Locking Pin, Safety Coupler Pin 1/4" x 1.97"(6.3mm x 50mm), Full Marine Grade 316 Stainless Steel Heavy Duty Shaft Locking Pin

These are great! I originally had some safety coupler pins on a metal basket that I keep on the back of my car. I lost one and ordered these in hopes that they might work.They are actually stronger than the original pins that came with my basket, and lock tighter, more securely then the original ones.I am very pleased.In that these have a stronger locking system, I am sure that they will last a very long time.I think they were an excellent buy for what they cost.If you’re looking for a good strong safety coupler, you can’t go wrong with these.

Works great to keep the gate locked for our deck.

Just what I needed to quickly hook my garden trailers behind our ATV. Strong enough to handle a load of wood. So easy to use and no parts to lose. EZ PZ.

I didn't do any measurements so a little smaller than expected but very useable. Like that it is stainless steel.

Cheap and durable

It was hard to pick out one of these couplers from the selection offered. This item is decent quality, but time will tell. I bought four to secure the belly lockers on our Airstream. They are stainless, so they should hold up to the environment.

Removed the pin on 04 14 2021 the full Marine Grade 316 Stainless Steel Heavy Duty Shaft Locking Pin was BENT after 1 use, I'm sure glad it was Heavy Duty I'm afraid of what light duty would be like. It was used on a Demco coupler as a safety pin for the coupler latch. See the Pictures attached:

I’m using these to hold a boarding ladder on my boat. They are more than strong enough and appear well made. With these pins I am able to remove the ladder when not in use.