ITEM NAME:0.3-3.6mm Keyless Drill Chuck Screwdriver Impact Driver Adaptor 1/4" Sh ty 0.3-3.6mm Keyless Drill Chuck Screwdriver Impact Driver Adaptor 1/4" Sh ty a.imagelink a:hover.imagelink {color:#000000;.Use This Chuck to Convert Any cordless Screwdriver into a drill or grinder. Convert 1/4" Hex Shank Screwdriver into a Drill. Drill Chuck Dia: 0.3-3.6MM. Allows hex drive power tools to use but drill bits.