Precision adjustable knife sharpening system is a great design, however, it has a few flaws. One of them being the clamp arm having a small amount of flex when sharpening, this flex will change your sharpening angle by a minor degree, possibly causing inconsistent results. Very easy to reposition when flipping blade. The main difference is that it gives you more confidence that your angle wasn't getting altered by the flexibility of the clamp mount. This piece is designed to stiffen the clamp arm, easy to place and remove. The brace is adjustable to increase or decrease the amount of pressure pushing back against the arm. Made from high-quality materials, the Clamp Arm Brace is built to withstand regular use and maintain its performance over time, ensuring long-lasting reliability. This Clamp Arm Brace provides improved stability and support during knife sharpening sessions, enabling users to achieve consistent and precise sharpening results on various blade types. Precision adjustable knife sharpening system is a great design, however, it has a few flaws. One of them being the clamp arm having a small amount of flex when sharpening, this flex will change your sharpening angle by a minor degree, possibly causing inconsistent results.