It is used in the finishing point with square where the continuing rebar is not screwed. In addition to the barlong system, the long gear side of the rebar is chased as long as 1 lock nut. With this technique, the incomplete gear system mounting problem is overcome which is especially caused by hanging the square on air in the beams and screwing the rebar.

1 rebar with short gear
1 rebar with long gear
1 plastic protecting cover
1 nut
1 coupler