The CenturionPro XL10 Commercial Wet & Dry Bud Trimming Machine is CenturionPro’s largest industrial trimmer. With a tumbler size of 77.8 cubic feet, the XL10 easily trims up to 3,000 pounds of wet buds or 600 pounds of dry buds in an hour, effectively doing the job of 2,400 people.
Those holes is where little rocks used to be to way down the product for bigger profits.
When selling, some people use sand, sugar, glass shards or silica glass to do the same thing. It's called "grit weed".
Seriously, I've had two friends hospitalized with severe chest pains from smoking such.
The purchased grit weed came from two different dispensaries here in LA (SFV). Some shops
buy it and sell it knowingly and some unknowingly. When buying from a shop always bring
a (10x at least) jewelers loupe. Trust no one.