The Delmhorst 832 Series is a multi-pin prod with 3 1/4" penetration and used on bagged seed, grain, sawdust, hops and shavings. Delmhorst also sells a short pin prod called the Delmhorst 831 Series Multi-Pin Prod with 1/2" penetration and used on chopped hay, sawdust and shavings. This Prod requires the Delmhorst H-4 Handle to be used.