Ergonomically designed non-slip handles are strong,lightweight, and comfortable. Razor sharp blades are made of high quality stainless. Best for Medium and Large Dogs Safety stop blade greatly reduces the risk of cutting toenail too short. 2nd product picture shows where the stop blade is. Free Hidden Nail File conveniently stored in handle will allow you to polish sharp nails to perfection. Safety lock prevent the scissoring motion when not in use. Please check 5th product picture and the product video to see how to unlock it. Nail Clipping Tips: For easier grooming, clip nails immediately after a bath. Apply baby oil to make the quick more visible. When trimming, do not cut into the quick. quick sensor will help to prevent that. Animals with white nails have a visible pink quick. Make shallow cuts, then use the included nail file for trimming. For animals with very long nails, make a shallow cut and trim again in roughly a week. This allows the quick to retract over time as nails are trimmed.