STANLEY 10-778 FATMAX RETRACTABLE UTILITY KNIFE DESIGNED FOR REPETITIVE HEAVY-DUTY CUTTING APPLICATIONS. RETRACTABLE BLADE OFFERS VARIABLE DEPTH. PUSH BUTTON FOR INSTANT BLADE CHANGE - NO TOOLS REQUIRED. RUBBER (TPR) SOFT TOUCH PANELS GRIPS FOR BETTER CONTROL AND FEWER SLIPS. THUMB PAD AND ERGONOMICALLY DESIGNED CUTTING ANGLE FOR MORE COMFORTABLE USE. BLADE STORAGE HOLDS UP TO 5 BLADES. SUPPLIED WITH ""5"" FATMAX BLADES. WORKS WITH MOST STANDARD UTILITY BLADES. MUST BE 18 YEARS OR OLDER TO PURCHASE THIS PRODUCT