The FANAUE DA-60 double socket arm is made of aluminum alloy and stainless steel, which is more durable overall. FANAUE Double Socket Arm. If you want to fix the 1 " ball of the device more tightly, you can use the Socket Arm to clamp the ball and adjust it to a suitable angle to act as a wrench, which can easily tighten the 1 " bally.
