COLONIAL NEEDLE: Turn-Sharp. This rotary blade sharpener makes sharpening blades effortless! You can easily turn the knob with your right or left hand, no batteries or cord to worry about, and you can use it with 28mm and 60mm rotary blade sharpeners. This package contains one Turn-Sharp, one 45mm rotary blade sharpener, and complete instructions. Sharpener made in USA, base imported.