From the manufacturer:
Ideal for cutting multiple layers of fabric, felt and vinyl, Fiskars® Loop Rotary Cutter (45 mm) features a high-grade, precision-ground, 45 mm premium steel blade for long-lasting sharpness. A sliding button extends and locks the blade for secure use, and a push-button retracts the blade for safe storage. Blade changes are faster and easier thanks to fewer loose parts. A curved, loop-handle design provides a natural fit for your hand, improves control and allows you to securely hold the cutter while positioning materials. This rotary cutter can be assembled with the blade on either side to provide optimal blade visibility for right- and left-handed users.
We also carry the replacement blades!