I run US mower heads and they last a long time.They use a steel called domex that is a cross of T-1 and AR400 so the heads last a long time,rockhounds heads are a mild steel head.US also power coats there heads and rockhound paints with a water based paint.
11' 3720 Deere cab tractor w/t loader
11' Dodge 4500 crew cab, 4x4,flatbed
10' Deere 323D CTL cab,EH controls,high flow,reverising fan 78" 4-in-1 bucket,US mower 72" Razor flail head, Deere PR96 power rake,Faver grapple
09' Dodge 3500 quad cab long box
07' 35D Deere mini-x US mower brush cutter
97' Deere F1145 front mower