Honestly, I think these are good for the price. It is sharp, going through leather is smooth. I just tested it out, take a look. Two layers of Wickett & Craig Bridle, about 3-4 oz, with Vinyl MBT .45 and .55. Top is .45, middle is .55 and bottom is .45mm. BUT! I wish the teeth were longer with less taper going up, that might not be possible though.