Every woodworker that uses micro drill bits has run into the problem of trying to find a chuck that will actually tighten enough to hold smaller drill bits. Standard drill chucks,Collets or ShrinkFit chucks are not typically suitable for shafts under 1mm diameter. Now with Fultons Micro-Chucks you can hold even the smallest diameters safely and accurately. Turn your drill press, drills, drill press or Rotary Tool into a micro-drill for for small drilling applications.