![](https://ae01.alicdn.com/kf/H2446b1608c194b21af931be87b89abe49.jpg)
① Wide-knurling plugs
Attractive and labor-saving
② The original steel seal of JSHOU BIKE factory
③ Stiffening via quenching bayonet
④ Replaceable pin
⑤ Quenching of screw thread
High coaxiality
Exquisite workmanship
Quenching and hardening heat treatment
No slippage on hardened threads
Higher cost performance![](https://ae01.alicdn.com/kf/H367fdb29e94f47d7a7598613ccfe9e50V.jpg)