Keene Gas Powered Rock Crusher RC46 934450 Product Details Model RC46 Rock Crusher with Roller Scraper Amazing 3 Stage Compact Rock Crusher This Model quickly crushes 4 x 6 Rock into ultra fine powder Over 20 years of manufacturing has proven this model to be a tried and tested reliable work horse Rock is quickly crushed into 18 . rckeene portable rock crusher . rckeene portable rock crusher ...