XtraArm Individual Single Yoke 1/4 20 Thread Black. So were we That is why we created our anodized aluminum vinyl dipped yoke for lightweight and extreme durability. It comes with a 3/8 16'' or 1/4 20'' Female thread options. Specifications for XtraArm Individual Single Yoke: Manufacturer: XtraArm Color: Black Fabric/Material: Aluminum Package Contents: XtraArm Individual Single Yoke XtraArm XTRA-ISY1420: Individual Single Yoke 1/4 20 Thread Black