Wolff Twice as Sharp Pro Scissor Sharpener Sharpens Fabric, Industrial and Grooming Shears Quickly and Easily. Comes with Training Video and Manual. Free Floating Arm System & Sealed Bearings Provide Years of Maintenance Free Use Honing Wheel Makes Scissors 2 to 6 Times Sharper Clamping System Adjusts from 0 to 55 Degrees to Match Angles Consistently Motor can be Wired for 220 Volt Use