This is the Hangar 9 Titanium Pro-Links 4-40 x 1-1/2" (2). Hangar 9's Titanium Pro-Links offer the ultimate in strength and security with the added bonus of ease of adjustability and ultra-light weight.

Overview:
With their size and weight, giant-scale aircraft place higher demands on their control systems. This is especially true for giant-scale aerobatic airplanes. Hangar 9's Titanium Pro-Links offer the ultimate in strength and security with the added bonus of ease of adjustability and ultra-light weight.

Each Pro-Link is machined from titanium bar stock and features a 4-40 right-hand thread on one side and a 4-40 left-hand thread on the other (turnbuckle). A machined hex in the middle allows you to make very fine length adjustments without removing the linkage from the servo arm or control horn. And because they are made of titanium, a 4-inch linkage weighs just 6 grams but has the strength to lift over 500 pounds.

Pro-Links are ideal for Rocket City, DuBroŽ, or any other 4-40 molded ball link or control horn and are available in 1/2-inch increment lengths from 1.5 inches to 5 inches. Hangar 9 also offers a machined-aluminum gold-anodized wrench that's perfect for making adjustments.

Hangar 9's gold-anodized machined-aluminum arms have been popular for years. They offer increased strength and rigidity, plus they really look cool! Previously the longest arms available were only up to 1" in length. Many 3D and aerobatic pilots just couldn't get enough control surface throw, especially on rudder for 3D aerobatics. Now Hangar 9 is offering a 1.25 in long 3D Machined-Aluminum Servo Arm. The arm is tapped with 4-40 threads and accepts most 4-40 ball links (Rocket City, DuBroŽ, etc.) and is available for JR/Airtronics or Futaba servos. Now 50° + throws are possible so pilots can 3D their brains out with total control linkage security and look good while doing it.