3.17mm hole saw blade sleeve, model M6-3.17, suitable for 6mm bore saw blade or grinding wheel blade, connected to 3.17mm shaft or 3.17mm motor shaft;
4mm hole saw blade bushing, model M6-4, suitable for 6mm bore saw blade or grinding wheel blade, connected with 4mm shaft or 4mm motor shaft
5mm hole saw blade bushing, model M6-5, suitable for 6mm bore saw blade or grinding wheel blade, connected with 5mm shaft or 5mm motor shaft; for example, 775 motor.
6mm bore saw blade bushing, model M6-6, for 6mm bore saw blades or grinding wheel blades, connected to a 6mm shaft or 6mm motor shaft;
8mm bore saw blade bushing, model M6-8, suitable for 6mm bore saw blades or grinding wheel blades, connected to 8mm shaft or 8mm motor shaft.