Collis "STA-TITE" Tap, Drill, and Reamer Chucks are designed for maximum gripping power. The four way split of the chucks allow for the tightening of the cutting tools in order to prevent tool pull-out. Collis "STA-TITE" Chucks are used with Collis "STA-TITE" adjustable adapters, tension and compression tap holders and floating holders.