PB-588 is outstanding masterpiece of 2012 which rotor is made of exactly CNC cut. It is protected by high tense metallic shell which not only safe but also
beautiful. The PB-588's torsion is a huge monster which can produce over 50kg-cm torsion when speed is reach to 10,000 rpm. Using the PB-588 in
10,000 rpm is like to hold a ten pounds bowling ball spinning. It is suitable for expert players like tennis players, bowling players, baseball players totrain their
wrist and arm. Just like our logo said, one minute, one powerful hand. Just get PEI! Do not hesitate.