This is a Recovery board bottle opener. When your done hitting the trails use this to pop open a drink. DONT DRINK AND DRIVE. 
I used 10x3mm magnets and generic 40mm bottle opener inserts. The magnets will be snug so you will need to use some muscle to force them in. Please note the screws that come with the bottle opener inserts SUCK. They snapped off. So either heat insert them in or source better screws. I heat inserted them in. Just use a soldering iron and push it in. The magnets are tight and meant to be press fit in. I used a vice to press them in. 
 

Bottle opener insert: https://a.co/d/4WMtNUw

Magnets: https://a.co/d/1jsO5PW