WD-40 Multi-Use Product Smart Straw WD-40 Multi-Use Smart Straw is the same reliable Multi- Use Product, specially designed for precision application. The permanent applicator is great for reaching those tight spaces in gears and mechanisms.With the Smart Straw down against the can, you can use the wide spray nozzle for greater coverage. For those hard-to-reach parts the WD-40 Smart Straw has a flip up precision applicator in order to penetrate stuck or jammed parts and provide essential lubrication, as well as displacing moisture.Stops squeaks. Drives out moisture. Cleans and protects. Loosens rusted parts. Frees sticky mechanisms. Silicone free. 400ml Spray.