Because the drill bit is made completely of diamond granules, the life-time compared to other only coated (and that sparsely) diamond bits is hundred-fold higher, because the drill can be used till the end.
(A merely coated drill is worthless once the few diamond granules at the front side are broken out.)

The shaft is cylindrical with the respective drill diameter.
Drill length approximately 30..40 mm.
Can be clamped into every chuck.
Without holder and ejector.

Thickness coating 6 mm, wall 1 mm.
Machine clamp system Belgian thread R 1/2".
Diamond concentration C 75.
Drill depth on diameter 6 mm up to 160 mm deliverable (request price)
Drill depth on diameter 10 mm up to 200 mm available (request price)
Drill depth on diameter 20 mm up to 250 mm deliverable (request price)
Other drill depth on diameter 180 mm up to 250 mm on request.
These drills can be delivered with approximate diameter 13 mm with cylindrical shaft (€ 6,- extra cost).