Ava's attractor is an item awarded to the player by completing the quest Animal Magnetism if the player is below level 50 Ranged. It is equipped in the cape slot, and picks up arrows, bolts, darts and knives, as well as having a ranged attack bonus. It also generates iron arrows into the player's arrow slot. The attractor won't work when metal torso armour is worn, as this causes 'interference'.
Players can commune with the attractor to stop it from gathering junk by right clicking on the item while it is worn or in the inventory.