Patented design features two sided tape blade - back of tape blade is printed with 19 handy height references for common building and finishing measurements: standard door height, counter height, joists, studs, trusses, switch plates and more. Fractionier® blade markings on blade front features callouts every 1/8" for faster measurements. Durable nylon coated blade for long life. Convenient double-sided blade hook. Comfortable and durable rubberized case. Lifetime warranty.