4 hardcover, to ensure licensed.

Superconducting, non-magnetic, precision, lockable terminals, messaging better, more stable, to adapt to high-grade DIY family.

Note: YARBO2009 new accessories have been upgraded electroplating process standards. Namely: Add plating copper and then electroplating 24K-5μ thick gold, the effect is more extraordinary, the quality is more stable, is ideal for DIY enthusiasts! (Note: pay attention to packaging identification, seal integrity, beware of fake!)