Milwaukee 49-22-0030 3-Piece Self-feed Bit Plumbers Set The only flexible extension where entire outer surface does not rotate Outperforms the competition based on independent test results This product is made of high quality material INSIDE CUTTING PLANE &#8211; Produces clean smooth holes. HEAT TREATED ALLOY &#8211; Maximum durability and wear resistance. RESHARPENABLE &#8211; Longer bit life-Less time and money buying a new bit. REPLACEABLE FEED SCREW &#8211; Effortlessly pulls bit through material. Standard Equipment: Self-feed Bits: 1-1/2", 2 ", 2-9/16 "; (6) Feed Screws; (3) Set Screws; and Hex Key REPLACEABLE FEED SCREW &#8211; Effortlessly pulls bit through material. Standard Equipment: Self-feed Bits: 1-1/2", 2 ", 2-9/16 "; (6) Feed Screws; (3) Set Screws; and Hex Key