This is no ordinary contractor bag. The super heavy duty low-density plastic will withstand even extreme conditions. At 6 mil thickness, this is a super-hero trash bag, thick and tough enough to cope with cut wire, sharp nails, broken concrete, jagged glass: all the toughest trash you can imagine. With that kind of protection against tears and punctures, these bags provide an extra measure of safety for any project. The 42 gallon size fits standard drum cans, but with the strong flat seam, these bags are great freestanding as well. The ultimate black contractor bags for use in the workshop, on the site, or even just in the back yard.