A unique magnet drilling extension accessory developed specifically for use in extreme depth drilling applications, where multiple extension arbors are mounted in series to achieve the required drilling depth.
Traditionally this application meantit was not possible to use a pilot pin with your broach cutter, leading to drilling instability. However, the retractable spring-loaded extension arboris designed to be used at the bottom of a series of extension arbors, meaning a standard pilot pin can be used with the broach cutter and used in normal operation, like with a standard spring loaded magnet drill arbor.