Drill Ø16mm diamond hollow drill bit with countersunk ring Ø26mm TESCH

Manufacturer: TESCH,
Type: 668181-8 / S16-26, 668182-8,
Drill bit length approx. 71mm 1/2” external thread.
The countersunk ring is adjustable and removable,
Weight: 208 g,
Application: Glass industry,
Condition: Good, second-hand