Manuals Brands Harbor Freight Tools Safety Harbor Freight Tools Safety Manuals ProdManuals has more than 7 Harbor Freight Tools Safety manual(s) covering 7 model(s). 5 D E F I N R Models Document Type 5 50 Watt Megaphone with Safety Siren D Disposable Earplugs 50 Pk E Ear Muffs F Foldable Ear Muffs I Industrial Ear Muffs N Noise Canceling Electronic Ear Muffs R Reusable Corded Earplugs