1/2 Inch Keyed Chuck 3/8 Inch-24 UNF Drill Chuck for Power Tools, Superior Electric, Mfr#: J3513A$12.99+
Keyless High Torque Drill Chuck 0.512" Cap., 5/8-16 Mount Size, Llambrich Usa, Mfr#: JK-130 5/8$303.99+
Keyless Drill Chuck 0.312" Cap., NMTB40 Mount Size, Steel, Lyndex-Nikken, Mfr#: NMTB40-NPU8-76$609.99+