These models are for converting a drill-powered spray paint shaker (link below) into an automated solution. Just add a motor, delay relay module and some wire and you have your own paint shaker that can be fully automatic and hands-off.
You will need a DC motor with a 32mm diameter gearbox and 36mm main body. This one from Servocity is what I used and is a nice high quality motor for this application:
https://www.servocity.com/313-rpm-hd-premium-planetary-gear-motor/
You will need a shaft coupler for the motor to the key:
Delay Relay Module - https://amzn.to/3NRs5IF
Spray Paint Shaker - https://amzn.to/4aJwN53
The author marked this model as their own original creation.