MUTUACTOR 4Pack Super Powerful Round Cup Magnet with 1/4''-20 Male Threaded Stud, 95lb Vertical Pull-Force Non-Shattering Neodymium Magnet with Nut and Washer for Lighting, Camera and Other Brackets.

Used magnets to install rear camera and monitor on skid steer. Magnets hold both very secure. Used two on each

These little magnets are super strong. I used them to mountmy solar panels. The only thing that I would love to see is a stainless steel option to prevent rust in outdoor use.

These are very strong! You won’t regret!

Everybody overestimates the strength of their magnets, but it depends on the steel it's attached to also.These (115# 1/4 x 20) magnets came in a small ziplock bag, and I almost couldn't get them out. They stuck to each other with such force I thought I'd have to get a pry bar to get them separated. In the end I used a towel to protect my fingers and pulled, twisted, pried and finally got them separated!I use them to mount a Milwaukee charger on the side of my toolbox and I didn't want to drill into the toolbox.Let me describe the process. The magnets fit perfectly in the corner holes of the charger bracket. I approached the toolbox area I had cleaned with alcohol, just for cosmetics.As I got about 3" from the toolbox, the bracket jumped to the side of the toolbox and stuck so hard I had to use a screwdriver to pry it loose to reposition it. There's no sliding it, it just went "WHAM"! Glad I didn't have my finger in between, or I'd still be calling for help.UPDATE: I keep finding new uses for these. I wanted to route an electrical cable around my tool box so it was flush with the wall. So I used a magnet and an insulated cable clamp, and stuck it where I needed.

Two of the packs had the wrong size washers. The threaded shaft may be 1/4-20 but the nuts are 10 mm.Holding power is okay. Not worth $5 a piece.