Strapworks Heavy Duty Side Lock Fits 1in StrappingStrapworks Heavy Duty Side Lock Fits 1in Strapping at discount prices! Strapworks is a plastic line of closures for construction or repair of backpacks, sports equipment, luggage, belts, sportswear and more. Lightweight and stron, non-rusting or corroding and blister packed. 1in webbing (item 1108) fits all closures. BLUMENTHAL/LANSING 1104.