B10( 0.5-6mm) B12(1-10MM) B16(1-13MM) B18(1-16MM) B22(5-20)drill chuck Keyless drilling chuck Self Tighten Automatic Locking
B10( 0.5-6mm) B12(1-10MM) B16(1-13MM) B18(1-16MM) B22(5-20)drill chuck Keyless drilling chuck Self Tighten Automatic Locking