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The trephine has a 270° cutting edge. A cut-out of 90° allows to create a flap hinge. Marks on top of the ring indicate the hinge area. 8.0mm Ø.
The trephine has a 270° cutting edge. A cut-out of 90° allows to create a flap hinge. Marks on top of the ring indicate the hinge area. 9.0mm Ø.
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