It's actually the nut behind the wheel. For example...years ago when NC Trad Archers had their trad shoot near Hickory, NC they started a primitive class. Like here, only string material was exempt. When we all came forward to start the round James Parker(he thought up the primitive class) was giving us the rules and someone asked him where his bow and arrows were. James ran down to the woods and came back with a sapling, some shoots and a hand full of pine needles and proceeded to hand straighten the shoots and tie pine needles in a spiral at the rear for fletching, pulled a string out of his pocket, braced the crude sapling bow and we were off. Guess who outscored everyone else...the master, James!