... Tools ,According to DID standard ,straight shank. HSS zero Flute Countersinks&Deburring Tools ,According to DID standard ,straight shank& ... ,2-5,5-10,10-15,15-20mm,with wooden box6pcs/set:2-5,5-10,10-15,15- ... ,20-25,25-30mm with wooden box5pcs/set:0#,1#,2#,3#,4# with wooden box8pcs/set:0#,1#,2 ... #,3#,4#,5#,6#,7#,8# with wooden box HSS zero flute countersinks & deburring ...