This is a Package of Five #21 Straight Cut Blades from Excel. FEATURES: Light duty carbon steel blades. Fit K1, K3, K17, K18, K30 and K40 Excel handles. Straight edge for trimming wood, plastic, paper and leather. Contained in a clear plastic tube with a lid. Carded packaging. INCLUDES: Five #21 Straight Cut Blades. SPECS: Length: 1-9/16" Width: 1/4" Edge: 1"