The design of this machine is interesting. It chips wood with sets of sharp swinging hammers mounted on a balanced rotor. These hammers strike the garden waste at up to 50,000 times a minute & allow branches to be fed at up to 3m/10 ft per minute. Each hammer can be flipped or reversed in four different ways, quadrupling the useful working life. Because the Briggs engine drives through a centrifugal clutch, it is under no load when starting & will only begin turning the cutters when up to speed. Furthermore, the clutch slips if overloaded. So it should not stall. The rotating parts & the chassis are quite simple and easy & very strongly constructed. What's in the box: Mighty Mac Chipper/Shredder.Specifications:

Designer: Mighty Mac Briggs & Stratton quiet 10hp 4-stroke IC engine Centrifugal clutch for easy starting Chips a branch diameter up to 90mm/3.5 in 24 reversible hammer-mill blades Shredder throat 445 x 430 millimetres for leaves & debris Shredder screen (removeable) of 25 millimetres Heavy-duty pneumatic tyres Complete with drawbar for towing Dimensions : L120 centimetres x W92 centimetres x H112 centimetres Dry weight 115 kilogrammes A Word from the Manufacturer Since 1966, Mighty Mac has been producing quality garden machinery, & has built up an enviable reputation for tough, well-priced & well designed products. With an extensive range including Chipper-Shredders, Cultivators, Leaf Blowers, Stumpgrinders, & Scarifiers, some of which carry famous names such as Merry Tiller & Turf Doctor. ....(continued here)