Reid Cobra Cold Knife Blades are extremely thin at the tip and gradually gain thickness and width toward the back to give the area where it is bent extra strength. The oval shape of the back produces a blade that has less friction than most cold knife blades. Cobra blades have an increased length that can provide you with up to 3/8" more room between the cutting edge and the cold knife pull handle. This makes them perfect for use in push-button cold knives. Made in the USA.