... vanadium steel 2,58 screwdrivers in 1 set, fit for cellphone,laptop and desk computer maintainance. 58 in 1 YH-201103 multi-function screwdriver ... Screwdriver rod made from senior chrome vanadium steel, hardened and black processing.4. Chrome vanadium screwdriver head ensure that the size highest ... mobile phone use)Word: 1,1.3,1.5,2,2.5,3,4 (most commonly used)Cross: PH00, PH0, PH1M and, PH2 (also most ...