The Delmhorst 831 Series is a multi-pin prod with 1/2" penetration and used on chopped hay, sawdust and shavings. Delmhorst also sells a long pin prod called the Delmhorst 832 multi-pin prod with 3 1/4" penetration which is used on bagged seed, grain, sawdust and shavings. Both these Co-axial Prods require the Delmhorst H-4 Handle to be used.
