Grooved sides and contours of the case prevent slipping. Fits comfortably in palm. Rust proof, tempered, carbon-steel blade is covered with special enamel. Print is protected with wear resistant lacquer. Curved blades of tape provide rigidity to help it span unsupported distances. Exclusive locking control secures tape positively. ABS or chrome plated case. Sizes: 2, 3, 5M.