Jacobs chuck

[Pipestone Kid]

Back in the sixties I bought a Jacobs chuck to fit on a half inch impact wrench. I can't seem to find one now. Does anyone know if they are still available? where? TIA Jim

[imported_PLUMBER RICK]

I REMEMBER SEEING IT IN EITHER A GRAINGER CATALOG OR MCMASTER CARR CATALOG. I TOO AM INTERESTED. WHAT CAN YOU DRILL WITH A 1/2'' IMPACT? WILL A SELFEED BIT DRILL WITHOUT ANY TORQUE TWISTING?