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The Rock Steady V-block is quality all metal machined aluminum. The 90 deg V fits any size aircraft spreader bar, bi-plane strut, or wing strut from a J-3 to a Caravan. The flat side of the block has two 1/4-20″ threaded holes.

Robinson Rib Clamp Base: This base clamp fits the wind screen rib channel on any Robinson R22, R44, R66 Helicopter or any 3/4″ tubing such as on Super Cub or Husky cockpit airframe tubing. This clamp can be easily tightened by hand making it a FAA friendly temporary mounting device. The thumb screw head also has a hex drive allowing you to use the included hex wrench tool if needed. This Clamp Base has a 1/4-20″ socket allowing you to attach your own mounts or any RAM ball mount.