MICRO CHUCK & ARBOR: 0.3 – 4.0MM 12.0MM SHANK

* This drill chuck and arbor is designed for micro drilling
* The 12.0mm diameter arbor is mounted in the drilling machine chuck
* The arbor is spring loaded allowing the operator to hold the nurled disc and feed the drilling action by hand
* This gives the operator full control of the drilling action when using fine drills