Bosch 11 Piece Diamond Core Set, this set is brand new. this has a small hole in the carry case (can been seen in pics). 
 
The Bosch 11 Piece Diamond Core Set from ITS is a selection of dry core cutters for diamond drilling.
These standard cutters deliver reliable and effective drilling in masonry. Designed to fit ½” threaded diamond drills, each segment has been laser-welded to ensure durability.
 
WHAT'S IN THE BOX
1x 38 x 150mm Diamond Cutter
1x 52 x 150mm Diamond Cutter
1x 65 x 150mm Diamond Cutter
1x 117 x 150mm Diamond Cutter
1x 127 x 150mm Diamond Cutter
1x Ejector Drift
1x Hex Adapter – G 1/2in
1x SDS-Plus Adapter – G 1/2in
1x Hex Extension – G 1/2in (240 mm)
1x SDS-Plus extension – G 1/2in (240 mm)
1x 200mm Pilot Drill Bit
1x Aluminium Roller Case