Fein Slugger high-speed steel annular cutters with 1" cut depth are used to create through-holes in metals up to 1" thick. Slugger cutters create smooth, consistent, high quality holes more quickly and economically than conventional twist bits. Annular cutters, often referred to as rota-broaches, have a unique cutting geometry that removes metal only at the O.D. of a drilled hole, (extending completely through the workpiece), releasing the central material as a metal slug when the hole has been cut. The center-free design of the cutter results in energy efficiency and reduced effort and cycle time. An operator can produce quality holes in metal 3 to 5 times faster than when using conventional twist drill bits. In addition, the Slugger's multiple cutting edges create an accurate, burr-free hole, minimizing the need for secondary operations such as pre-drilling and reaming. Please note: Annular cutters must be used with a cutting oil, paste or wax to achieve best results. Lubrication must occur inside the cutter bore to avoid overheating or premature failure of the cutter. Follow your magnetic base drill manufacturers operating instructions or contact us for additional information on properly lubricating a cutter for your application.