This CHEEP yet versatile cutter is great for rough cutting of carpet off the roll. So give it to your helper to cut up the job with out cutting up the driveway. It takes slotted razor blades, utility blades, or Crain No. 300Y blades. When used with utility or Crain No. 300Y blades, the blade angle cuts from the carpet's backing to prevent shearing and wadding up of yarns. Steel springs on both sides of the cutter hold the carpet down as it is being cut. Large thumb knob allows simple, fast blade changes. So for 22 bucks, what do you have to lose?