Trademark Easy Open Utility Knife,withlock Blade Knife,Blue utility knife blade measures 2.375 inches blue annodized aluminum handle liner locking blade design steel blades and frame; metal thumb stud for easy open 3 replacement razor blades Utility knife blade measures 2-3/8-Inch; Blue anodized aluminum handle Liner locking blade lock; Steel blades and frame Metal thumb stud for easy open 3 replacement razor blade Dimensions open: 5-3/4-Inch by 5/8-Inch by 1-1/2-Inch Dimensions closed: 5-3/4-Inch by 5/8-Inch by 1-5/8-Inch