Question about sharp aggregate.

Didn’t know where to post this but I may have a potential job in the spring/summer for removing grass and installing some sort of sharp rock to keep snakes away from a building. Now I know the whole bit about snakes and eco systems but this property is in an industrial park beside a highway, the renters have had issues with snakes sunning at their main entrance and getting into their main garage bay.

So my question is has anyone ever installed a ground cover product that seems to deter...

Question about sharp aggregate.