Perfect Seal Collets (PSC) allow for coolant through the cutting tool. They can be used with MEGA Double Power Chucks, Hydraulic Chucks, and New Hi-Power Milling Chucks.
ER nuts are basic nuts with surface treatment for friction reduction. They have slots on the outside diameter and use a spanner wrench for nut tightening.
Micro pilot drill geometries with 1-2xD flute length, large point angle, and positive diametrical tolerance allow them to optimize the guidance of a succeeding drill.