The contour turbo blade is a great choice if you are looking for a clean round cutting a sinkhole. It features long side protection segments for a longer lifetime. 5" blade has an option of vacuum brazed version which is optimal for faster cutting and marble cutting.
 
Machine: Angle grinder, Circular saw
Application: Marble (w/ Vacuum Brazed)
Use: Wet or Dry
Diameter: 5"
Tip: 7.5mm x 3.2mm
RPM: 12,200