The GJANSH 2Pcs Keyless Drill Chuck Adapter Set is designed for users who need a practical way to adapt power tools for drilling tasks. With a 1/4" hex shank quick-change design, it is suitable for impact drills, handheld electric drills, cordless drills, angle grinders, and some electric screwdrivers or impact drivers with a 1/4" hex collet. This set includes two adapters with different clamping ranges: 0.3-3.6mm and 0.6-8mm. It is made from high-strength carbon steel, and the quenched jaws are described as offering hardness and wear resistance for secure bit holding. The adapter can also be useful for pre-drilling with 2-5mm bits in furniture assembly or for switching between large and small bits on bench drills without frequent chuck replacement.