2Pack Multifunctional Magnetic Support,Used On The Wall, Table, Bedroom, Car, Can Hold Keys, Knives, Iron Tools

Two are cheaper
Single-Sided Magnetic Design Single-sided magnetic design is to protect sensitive items on the other side. Credit cards and cell phones placed on top will not cause damage while you mount the magnet under the table.
Gun Magnet Mount 55 Lbs Rating,Rubber Coated Gun Holder Using in Car, Truck, Wall, Desk, Vehicle and Home
Features
Widely Used Not only used for gun,but also mount other tools,like spanner,scissors,key and so on. It is also suitable for magnetic suction tableware, repair tools, etc. in the kitchen. It is small and easy to hide, and it is quick and easy to install.
Two packs including: 2 x Gun magnet mount 8 x 1/2 screws 8 x 1/4 screws 8 x plastic expansion tube 2 x Double-sided adhesive