Heller hss cross hole countersinks 90 heller 22596 0 this set of 4 90 hss cross hole countersinks from heller are ideal for quick and easy deburring in metals and plastic the set includes countersinks with a capacity of 2mm to 20mm heller 22596 0 0923 hss cross hole countersink 90 set 2 55 1010 1515 20mm