Non-magnetic brass compass screwdriver is CNC machined from solid brass stock. Small flat blade allows the adjustment of any airplane compass.

This time-saving kit includes our top of the line 2EM Differential Pressure Tester and the new 18MM-XT Spark Plug Port Extender for effortless leakdown testing at a great value.

Our own ATS brand Differential Cylinder Pressure Tester combines the features of our popular 2E tester and a Master Orifice into one tool.

Our Spark Plug Socket features a thin-walled design to get into to the tightest confines. Magnet interior guarantees that you won't accidentally drop the plug. Works with all Champion and Tempest Aviation Spark Plugs.

For all Continental and Lycoming engines. Adjustable type to work on all series engines. Ring installs on rockers and "C" collar compressor spring to allow keeper removal.

Great package deal featuring our 133 Microstop Countersink plus 4 pilot cutters (1000-100 series) in sizes #40, #30, #21, and #12 all packaged in a custom foam lined case.

Range 15-70 Lbs in 1 lb increments. Cable sizes: 1/16" 3/32" & 1/8". Accuracy within +/-10 percent. This tool provides easy, direct reading, low cost, high quality and accuracy. It's designed compact as to fit through inspection holes. Factory calibrated.

Innovative new reversible safety wire twister changes from right hand to left hand twist at the flick of a switch. Positive locking mechanism prevents accidental direction change during series wiring. Assembled in the USA. 6" length

Adjusting cable turnbuckles no longer has to be a dreaded ordeal, and you won't need three hands to do it. With our new Turnbuckle Rigging Kit you'll get a complete solution.

This extension tube makes it easier to avoid obstructions when performing compression checks. Extends 8-1/2" to clear manifolds, harnesses, etc. For use with ATS model 2E and 2EM Compression Testers. 18MM threads fits most aviation engines.

Spark Plug Tray. Holds up to 12 spark plugs. Spark plug positions marked 1-6. All metal construction.

Chaser cleans threads in spark plug hole of dirt, carbon build-up, and metal particles. Double ended for both 14mm and 18mm threads. Neoprene band on hex drive holds tool securely in any 13/16" deep-well spark plug socket.