Description The Engine Calibration and Setup Kit gives you innovative tools that help eliminate mistakes when setting up mechanical engine timing sequences, timing chains, timing belts, distributor installations, and general engine setup. Comes in a durable blow mold case. Made in the USA The Engine Calibrations and Setup Kit Include: #7"80 - Standard 6"25" (1"mm) TDC Indicator #7"86 - Extended 1".7"? (1"mm) TDC Indicator #7"81"- Compression Gauge Extension #7"82 - Rigid Compression Whistle Alert #7"94 - Flexible Compression Whistle Alert #7"7" - Long Piston Stop #7"92 - 1"mm to 1"mm Spark Plug Hole Adapter #7"85"- 1"mm to 1"mm Spark Plug Hole Adapter