Material of the rebar coupler is No.45 steel.

Working principle: 
1,First,We use GQ50 rebar cutting machine to splice up the end of rebar.
2,Secondly,we use Upset Forging Parallel Thread Machine (BDC-Auto1 Machine) to forge the end of rebar. 
3.Third, we use Parallel Thread Cutting Machine (LW-I500 Machine) to thread the ends of the rebar which have been forged. 
4.Fourth,an upsetting coupler is used to link the two ends of rebar in parallel thread.

FAQ:

Q: Are you trading company or manufacturer?

A: We are a manufacturer, you are welcome to visit our factory.

Q: how long is your delivery time?

A: Generally it is 15-20 daysafter payment.

Q: Do you provide samples?IS it free or extra?

A: Yes, we could offer the sample for free charge but do not pay the cost of freight.