This is a Lyman Magnet, model 03190.
This 3 Magnet design gives the Pac-Mag more strength than any other gun magnet on the market. Holds rifles" shotguns" and handguns. Holds up to 30Lbs.
Features:
3 Magnet Design
Overmolded Rubber Protects Finish
Holds up to 30Lbs