it is called a bepex dicinegrater it is used in food industry to shred beets and carrots for juice extraction it is very abrassive.
after the hammers are built back up i think 1/8to 3/16 thick would do the job. the hammer end is 3/4 thick 4" long 2"wide
thanks for your help

can u harface stainless steel i am currently building up the hammer blades with sandvik 308 but they where out so dam fast i can't keep up any helpful sugestions would be greatfully appreciated thanyou