Cut perfect beveled oval and circle openings without connecting to any other equipment ‑ single, double, or even triple mats! Adjusts from oval to circle cutter with a simple twist of the knob. Unique 3‑step mechanism is fast, portable, very easy to use, and costs hundreds less than comparable oval cutters.Cut ovals from 3‑1/4" x 4‑3/4" (8.25cm x 12cm) to 20"x 23" (51cm x 58cm) and circles from 4‑3/4" to 20" (11.5cm x 51cm) diameter. Maximum difference between oval width and oval height is 3" (7.62cm). Includes five extra blades.