HEAVY DUTY - Firm grip Anti-skid high impact rubberized ABS case. Bottom speed brake controls blade retraction. DURABLE - 1 Inch wide nylon coated blade resists rust & corrosion. Dual side matte finish white & yellow scale print. PRECISION - True zero multi-catch hook for both internal and external accurate measurements. PERFORMANCE - Easy to read fractional graphics, Stud center markings every 16" and 19.2" - Simplify framing jobs. LONGEVITY - Superior internal mechanism with Heat-treated manganese spring provides long life and smooth operation.