Hyde Tools 42330 Utility Knife Blades, Silver This product is a paint rollers This product is easy to use The product is manufactured United States 18mm blades are great for cutting heavier materials such as carpeting and drywall Package contains 5 blades, with 8 sharp points per blade. To refresh the blade, simply snap off the point to reveal a fresh one. No tools required All HYDE snap-off knives have built-in blade breakers for added convenience Hyde is America's favorite brand, chosen two to one by contractors for over 20 years For use with HYDE #42028, #42030, #42047 and most other 18mm knives