Straight bits will not fit the Dewalt 1/8 " collet.
Straight end bits will not fit 1/8 collet " 3.175mm Dewalt 660. All other bits seem fine, the shank diameter on straight bits is 4mm.
Pros
Perfect Cut ---- 1/2 flute design, mirror finish and larger chip space on the CNC router ensure non-adherent chips, smooth cutting and fast chip evacuation