Very well-constructed, but a PITA if your amp or speaker terminals are close to each other. Take care to wrap the grips in electrical tape before turning anything on to prevent arcing and breaking something.
Between the weight, finish, and the threading, there's clearly a high level of build quality consistent with other Monoprice products. As the title says, I'm using these with spring clips on some older receivers/speakers. Only drawback I've found to date is that the pins are a bit long.
These are well constructed and dont suffer the same issues as the banana jacks of the same type. The issue I have is the pin itself unscrews from the base. This kind of causes you problems if it's not tight. It's one more piece between your wire and the speaker to cause issues.
These do work and are easy to connect the wire to. That's about it. The barrel is too long and heavy to give me any confidence in a long term application. Once in the spring clip they sag from the weight of the barrel. I was concerned they would eventually damage the spring and clip. They also have a bad habit of skewing to one side or another. If your terminal are close that could cause an inadvertent short. I even tried trimming the length of the pin but that was little help. I used these for two days and then removed them from my system. Would be better if something other than heavy metal was used.
I bought these to use in the back of my Denon AV receiver, using 16AWG OFC by Rocketfish. I didn't end up using them because I found that when inserting them into the spring-clips in the back of the receiver, they would not insert deeply enough.
I don't believe this to be a product defect, hence the 5 star rating.... more that the spring-clips on my receiver didn't allow for enough of the pin to enter and hold for it to be a solid connection. I could only get the pin into the first notch, and then because of the weight of the plug and the wire, it dangled and swayed in the spring-clip. I felt it very likely that they would swing into each other and make contact (short) at the back of my AV receiver, so I took them off.
PROS: Inexpensive, does what it is meant to do.
CONS: Perhaps the pin is too long?
I used 16AWG OFC wire by Rocketfish, I could not get the wire up through the center of the plug, finding that the jacket for the wire was too thick. So I inserted the wire in the side and screwed down upon the wire. This clamp-type of mechanism is tenuous at best, sometimes just moving the cable into position I found that the wire pulled a bit out of the clamping screw.
I used these to connect my sub to my ancient receiver which has no sub output and has the suboptimal clip type speaker jacks. Banana plugs can "stack" into these to connect the sub in addition to the main front speakers to the main jacks.
PROS: Well built for the price, versatile, problem solver for old receivers.
CONS: Can short, need to insulate if they might touch each other.