... ,Rubber sleeve is wrapped shell. 2.Durable in use. 3.Environmental protection. 1.ABS Case is enough thickness and hardness ... , more durable.2.one brake.3.Material of blade is 50# carbon steel, 0.1mm thickness.(It depends ... elastic,65# manganese steel material,toughness is very good.5.Blade Graduations:metric Graduation,British-metric Graduation,british Graduation.size and ...