Interstate Ultra Precision Drill Chuck 0-1/2"  J6 

3-Jaw, Keyless

• Super Heavy duty ultra precision drill chucks.
• Normal gripping power when hand tightened. Double the tourque when used with a spanner wrench
• Closer tolerances assure exellent runout accuracy
• Especially suitable for CNC matching centers; will not loosen up with instant spindle stop and reverse