Rotary cutters are very accurate for corset making because you do not have to lift the fabric from the table. the 45mm size blades are a good size for cutting fast and around corners. Blades will cut up to 6 layers of regular fabric but only 2 or 3 of corset coutil because of it's density. Blades do need to be changed quite frequently because of this. Olfa rotary cutting blades are made from tungsten tool steel and therefore they do last a bit longer than other brands.
Replacement blade fits any Olfa 45mm rotary cutter