Professional Razor Edge Multi-Colord Barber Scissor Adjustable Screw, Removable Finger Rest. Available Sizes. 4 in, 4.5 in Details. Razor edge hair dressing scissors made of Japanese stainless steel J/2 – 420, HRC (hardness) 52 – 55. Also Avaiable in 440c, HRC (hardness) 60 – 65. Available in Fix, Limitaion, Adjustable and hand adjustable screws with and without leaf spring.