See it here: https://www.tricktools.com/FeinASCM...

The Fein ASCM 18 QM 4speed Cordless Drill/Driver is the world's first cordless drilling system built for metalworking. The powerful 18volt brushless motor is fully encapsulated to protect the motor from dust and dirt. The unique 4speed solid metal gearbox ensures optimum speeds and torque for everything from drilling with annular cutters to driving selfdrilling screws or even tapping holes.

The easily detachable 1/2 inch QuickIn Chuck accessory can be removed to expose a drill driver bit holder or exchanged with an optional rightangle attachment, tapping collet holer, annular cutter quickrelease chuck, extended 1/4 inch bit driver head, or 1/2 inch drive socket adapter

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