Drill Ø28mm diamond hollow drill bit with countersunk ring Ø28-38

Manufacturer: WENDT,
Type: 22807123 / S28-38,
Drill bit length approx. 73mm,
1/2″ external thread,
The countersunk ring is adjustable and removable,
Weight: 269 g,
Application: Glass industry,
Condition: good, second-hand