These crushers are the next generation of crushers. All of the critical parts are cut out with a CNC Laser to insure everything is square and precise. The bolts & nuts that hold the hammers and mount your motors are schedule # 8 alloy. Your new K&M Krusher features either an 11' or 14' Drum with a 2-1/2' or 3' Infeed Tube. The Hammers(chain) are a Rockwell Hardness of 62 on the outside and #58 on the inside turning your 2-3/4' rocks into 100-200 mesh talcum powder. Easy 3 wing knobs for front plate removal. The screen in the bottom of the drum is now fitted with a new easy replacement system. The screen is stainless with more holes per inch than any other crusher allowing more thru-put. We also send you the allen wrenches to maintain your crusher. Pricing is different from model and drum diameter. The Electric Motor is a 1 hp Smith & Jones motor, also offer a 5.5 hp Honda gas engine, 6.5 hp Carol Stream gas engine and a 7 hp Kohler gas engine. Currently these crushers are in stock, ready to ship. These units are Built to last...Heavy duty construction Turns rock into a talcum power like dust 100-200 Mesh 500-1000 Lbs per hour.