materials:45 # steel, superficial nickel plating 11 in 1 muti-function bicycle toolmaterials:45 # steel, superficial nickel platingHex wrench: 2/2.5/3/4/5/6/8mm,Cut chains,Special tool (T25 butterfly brake word torx head screw, hex wrench 8/9/10 cross-screwdriver mmSurface finish :nickel plating portable and steady