idbox! extruder enhanced arm "Beetle"

Parts list
1.Arm body
2.Iron plate(56x9.5x1.6 hole dia3.2*4 Hole spacing15) x2
3.Iron plate(41x9.5x1.6 hole dia3.2x3 Hole spacing15) x1
4.Trus Head Screw M3-15 x1
5.Trus Head Screw M3-25 x2
6.M3nut x3
7.Trus Head Screw M4-15 x1
8.M4nut x1
9.m3spacer L=5 x3(idbox Genuine parts)
10.624ZZ bearing x1(idbox Genuine parts)
11.Tension Spring x1(idbox Genuine parts)