Description The Jacobs(tm); technically advanced keyless chucks are the most exciting innovations in drill chucks ever. They significantly reduce bit changeover time and boost productivity. Based on an exclusive patented design, the Jacobs® keyless chuck achieves higher gripping torque than standard keyed chucks, and there is never a key to misplace. They feature a nonrusting, high-performance body with a unique sure-grip sleeve for maximum user comfort and hand tightening efficiency.