3M™ E-A-R™ Skull Screws™ push-to fit corded foam earplugs sport the tough look of threaded metal, but feel of soft foam, while offering push-to-fit convenience and noise attenuation with attitude. Effective hearing protection and compliance with a clean, easy twist. Benefits •Tough look of threaded metal, but feel of soft foam •Push-to-fit style means no earplug roll down required •Foam tips stay clean, even when your hands are dirty. •Noise Reduction Rating (NRR]* of 30 dB CSA Class AL •New, softer foam •Improved NRR of 32 dB