The Keson Steel Blade Tape provides users with accurate measurements. The double screws hold the housing together in case of accidental drop. The improvied plastic and molding shape offers increased durability and longer life. The tough, double nylon-coated 3/8" steel blade holds up in tough work conditions. The reel also features a metal reinforced handle for excellent strength and a break-resistant polycarbonate case. Uses Blade E1.