0.0001,-. These miniature 3-flute carbide end mills feature a necked portion behind the flutes, shown in the table below as the reach.Premium Sub-Micrograin Solid Carbide End Mill3 FluteSquare EndSingle End 30° Helix1/8" Shank x 2-1/2" Overall LengthLong Reach with Long FlutesCenter Cutting Carbide EndmillView Carbide End Mill Speeds & FeedsCarbide End Mill TolerancesSize RangeDiameterShankAll Sizes+.