Beware the spring!
Make sure you use a small tool (like an awl), steady hands, and have a 2nd pair of eyes at the ready... My finger slipped while putting this in, and the spring and plunger went flying. Thankfully I was able to locate both, but I was freaking out until I did.
The product is well made and I should have no problems using it.
Reviewed by: Trevor from CA.