Hello , I'm Chuck My wife an I Own A Five Bay Automotive Repair Shop In Georgia. We Work on Anything So As You Know Every Type Of Vehicle Has It's on Special tools. There Many tools that we had made around here I'm not sure what to post for y'all to see . I will dig around an find something to post. What I'm looking for is a way to grind sand down to make it smaller for a sand blaster , I thought i could go to our local hardware store and buy some pool filter sand that will work in a Blaster ( I was wrong ) There is too many big pieces that stops it up . I can filter it out by using a screen to take out the bigger pieces and then take a hammer then hit the smaller pieces it's just taking to long. So I was hoping that someone on here had came up with a way to grind sand down Thanks for any help