... According to DID standard ,straight shank&taper shank4pcs/set:2-5,5-10,10-15,15-20mm, ... 5,5-10,10-15,15-20mm,with wooden box6pcs/set:2-5,5-10,10-15,15- ... 20,20-25,25-30mm 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 ...