Cushion Lock Cutter rounded notches on the front guide help this cutter find rows in difficult carpets including Berbers, hydra shift, and commercial level loop. Cushion Lock Cutter takes standard slotted razor blades. The offset blade clamp allows fast blade depth adjustment and blade changes. For best results, trim WITH (in the direction of) the nap sweep. Beginning at a starting point on the left side of the seam, trim with a blade down on the left side of the cutter.