New 1 set chuck Adapter, from SDS drill chuck change to 1/2 inch drill chuck. When you install this Adapter, the SDS hammer drill can use up to 1/2" (12.7mm) straight shank products. Very useful tools. You will receive ALL THREE PARTS as same as picture shown. | not use in hammer action mode. US-BASED CUSTOMER SERVICE: Available by chat, email, phone, or visit us at our customer service center in La Crosse, WI.