Please select size from the pull down menu. UNF Size Part # Inserts Per Package 3-56 STR3-56 10 4-48 STR4-48 10 6-40 STR6-40 10 8-36 STR8-36 10 10-32 STR10-32 10 1/4-28 STR1/4-28 10 5/16-24 STR5/16-24 10 3/8-24 STR3/8-24 10 7/16-20 STR7/16-20 5 1/2-20 STR1/2-20 5 9/16-18 STR9/16-18 5 5/8-18 STR5/8-18 5 3/4-16 STR3/4-16 5 7/8-14 STR7/8-14 5 1-12 STR1-12 5 1-14 STR1-14 3 1-1/8-12 STR1.1/8-12 5 1-1/4-12 STR1.1/4-12 5 1-3/8-12 STR1.3/8-12 3 1-1/2-12 STR1.1/2-12 3 note: The Sets include a High Speed Steel Tap, Inserts and Installation/Tang Break Off Tool. A drill is not included but the recommended size is listed. The insert length is 1.5 x diameter. For more information please visit: http://www.newmantools.com/recinch.htm