The MR- 88 Ductile Iron Duckbill is a hot dipped galvanized heavy duty anchor that can be driven with much more force than the Aluminum Duckbill 88 anchor. As a result they are ideal for hard or rocky soils where you don't need a big anchor to get a lot of holding capacity but nee to be tough enough to drive with a pavement breaker. Power drive rods are available for sale or rent to be used with a 40# class or larger pavement breaker/jack hammer for installation. Hand drives rods are also for sale
The big unknown when installing earth anchors is the holding capacity of the soils. The LL-1or LL-2 Load locker not only sets the anchor but also tests the anchor at the same time to give you a confirmed load capability. These are ideal for permanent airplane tie downs for small rural airports.