OLFA® CTN-1 is a premium quality carbon tool steel for superior sharpness and durability. The CTN-1 comes complete with a 4 point snap off CTB blade. 
 
The OLFA® CTN-1 is perfect for cutting foam board, corrugate and cardstock.
 
The OLFA® CTN-1 also features it’s own blade snap off tool, when a blade becomes dull, simply open the blade holder, take the blade out, break the blade off at the back to reveal a new sharp point.