These are Excel #2 Straight Edge Blades.
FEATURES: Made from precision high-grade steel Interchangeable Used for the cutting and trimming of wood, plastic, and rubber Blades come in a clear plastic safety tube
INCLUDES: Five #2 Straight Edge Blades
REQUIRES: Excel #2, 5, or 6, Handle Safety goggles Adult supervision lmm 01.15.10
BOX DIMENSIONS: 2.13" W. X .63" H. X 4.50" L. BOX WEIGHT: .03 LBS.