KW-Trio 3020 is a high-quality rotary trimmer that is equipped with a sharpened carbon steel blade unaffected by the wearing action of the materials to cut, easily line up your material and cut perfectly straight. Sturdy construction ensures accurate right angles. Solid steel base with paper sizes in mm. and inches printed on it. Both ends are made of high-impact, strong, ABS plastic. Some units feature an interchangeable blade for added versatility and long life. Proven quality, made in Taiwan. Excellent for office, school, or home use.