Hole saws with variable pitch 4 –> 6 mm.
Smoother cut, reduced vibration.
Cutting depth: 34 mm.
Replacement chuck + drill bit for hole saws 19 –> 29 mm: 609A.M1.
Replacement chuck + drill bit for hole saws 35 –> 68 mm: 609A.M2.
Set of 2 replacement drill bits + chuck screw: 609.M-ACC.