Accusize - H.S.S. Annular Cutter Set - 1" Cutting Depth, 7/16" - 1-1/16'', 8 Pcs/Set, HCS1-0000 Cutting Depth: 1&#039;&#039; Cuts holes in steel accurately, quickly &amp; safely Large holes can be drilled up to ten times faster than regular drills bits Make overlapping holes, slotting holes and edge cuts Made from tough, high-speed tool steel Machine-finish hole-no reaming needed when used with lubricant with 3/4&#039;&#039; Weldon Shank American Standard 1 piece #2080-2012, Dia. of cut (in): 7/16&#034; 1 piece #2080-2014, Dia. of cut (in): 9/16&#039;&#039; 1 piece #2080-2016, Dia. of cut (in): 11/16&#039;&#039; 1 piece #2080-2018, Dia. of cut (in): 13/16&#039;&#039; 1 piece #2080-2020, Dia. of cut (in): 15/16&#039;&#039; 1 piece #2080-2022, Dia. of cut (in): 1-1/16&#039;&#039; and 2 pieces pilot pin, 1/4&#039;&#039;x3&#039;&#039;, #IBC0-0070