Replacement 17mm Inner Diameter Metal Flex Shaft Rotary Tool Attachment Black, Model: Product Name : Flex Shaft Rotary Tool Attachment;Adapter Dia. : 17mm-21mm/ 0.67 x 0.83(Inner * Overall Size : 107 x 0.9cm / 42.1 x 0.35 (L*D);Color : Black, Silver Tone Material : Metal, Rubber Weight : 214g Package Content : 1 x Flex Shaft Rotary Tool Attachment