Serrated blades are superior to smooth blades, as they slice through hard hooves more easily without slippage. Serrations grasp the hoof when cutting and takes less hand strength to operate. Japanese steel blades hold their edge. Rounded blade tips can be safely used for cleaning and probing hooves The ARS 140DXR Serrated Trimmer is unique to Premier 1 Supplies. The ARS 140DXR Serrated Trimmer is unique to Premier. Serrated blades are superior to smooth blades, as they slice through hard hooves more easily without slippage. The serrations grasp the hoof when cutting and takes less hand strength to operate. The ARS 140 DXR Serrated Trimmer is a customer favorite. It is the gold standard for paring goat and sheep hooves. Their cutting stroke is ultra-smooth. Japanese steel blades hold their edge. Rounded blade tips can be safely used for cleaning and probing hooves. Strong and comfortable handles for left and right handed users. Trimmers measure 7.5" long with 1.75" steel blades and have a secure locking system. ARS 140DXR is also available with smooth blades on Amazon. See item 769500 on Amazon for ARS 140DXR Smooth Blade Trimmer.