Why is the Knife-Guard brand one of professional quality? I created the first friction gripping knife guard back in 1982. The following years were spent trying to improve it. Yet, it wasn't where I wanted it to be until the early 21st Century. That's when I got the funds to invest in a piece of tooling called a calibrator or sizer. It controls the product's shape as it's extruded out of the die. It now has a refined profile that grips the blade securely and resists cracking. This is due to its design and material. We source this material ourselves, so we know that it contains no fillers like calcium carbonate and talc. Some may use them to lower their resin cost, but you can't afford to have them in a product that needs to withstand stress. By keeping this product manufactured in America we were better able to develop and maintain its quality.