Grapples are the least glamorous and most consistently profitable attachment in forestry. Almost every operation needs one, they are mechanically simple, and geometry rather than size determines whether they work well.
Australia has genuine domestic manufacturing in this category. Randalls manufactures rotating log grapples locally alongside distributing international forestry brands, and New Zealand-built equipment is represented here for felling, bunching, log loading, woodlot thinning, sorting and stacking.
The commercial mistake is selecting on jaw area. A large open area does not guarantee a secure grip on your material — closing profile, tip shape and jaw count determine whether pieces are held or re-handled, and re-handling is pure lost time.