X-acto Snap-Off Blade Knife pack of 5 refill blades X243

Heavy duty cutting, stainless steel blade channel. Has a ratchet blade lock for adjusting blade depth for precision cuts. Contoured handle stores two replacement blades. Comes with two bonus blades. Knife measures 6 1/4 in. long. X3246 Replacement blades contain a pack of five strips of seven snap-off seven blades.