Accurate, easy access into hard-to-reach tapping locations
The smaller socket end OD permits the extension to pass through a standard liner bushing
Construction to close tolerances and carefully heat treated alloy steel for strength and durability
Each extension is designed for a specific tap size
The tap, supported by the close-fitting deep socket of the extension, is held firmly in position by two socket set screws bearing 90 deg apart on the square of the tap
Extensions are considerably less costly than special length taps and can be used again and again