Each Andis UltraEdge blade is sharpened to exact quality standards and is hand-tested before it is shipped. Blades have a Rockwell Hardness rating of 65. This blade it is most often used for a smooth, short lamb finish. It is effective for finishing the coat after trimming with a #5 skip tooth blade. Blade also leaves a nice finished length on the coats of wire, welsh and Lakeland terriers.