Orange-peel (multi-tine) grapples are the standard choice for most scrap handling because their tines penetrate piles and grip irregular shapes effectively. Four- or five-tine designs are common; closed or semi-closed tines help retain smaller pieces. Magnets are preferred when the material is primarily clean ferrous metal and selective handling is required.  For demolition and wrecking, a positionable/rotating grapple is often preferred mounted on a standard excavator.  These grapples allow more precise grabbing of material and more power to pull and separate materials for sorting and demolition.  Alaska Craft can supply grapples from small mini excavator sized units up to giant ship loading grapples including large self-powered, remote-control units.