Rescue W-H-Y Trap Attractant Refill Kit Rescue W-H-Y Trap Attractant Refill works inside of the Rescue W-H-Y Trap to capture three types of stinging pest insects. W-H-Y Trap Key Benefits & Features non-toxic mode of action contains a 2 week supply lures the queens in early spring before they build nests no-killing agents so the insects die naturally will not lure beneficial honeybees. For outdoor use.