Leofoto brand 38mm DDC-38 Arca-Swiss compatible Quick Release Dual Clamp Set. Can be configured as Subtend or Bidirectional. Location pins for precise alignment. Male raised boss that engages in the registration slots. Use together and separately. CNC machined from aircraft aluminum and hard anodized finish. Each clamp is 38mm (1.49") in Length. Weighs 143g (5 oz). Includes screw and Allen wrench. Arca Swiss standard opening jaw. Compatible with Arca Swiss / RRS style plates.