Using the finest Japanese Cobalt/Molybdenum alloy steel with our special Cryogenic Tempering, we set out to make a series of shears to rival the best of what our competitors were offering. We have included a polymer inlay in the full pivot area to eliminate metal to metal wear and a leaf spring ball bearing tension system to stabilize the blades and extend their edge life. The REVO even includes ball bearings in the thumb for perfect rotation. The REVO and EVO SENSEI shears are elite tools that belong alongside the very top of our competitors offerings. REVO and EVO also has a unique serial number so you can register your pair on our website.