Amazon.com: Bosch Professional 1x Hole Saw HSS Bi-metal for standard adapter (for various materials, Ø 105 mm, Accessory Rotary Drill) : Tools & Home Improvement
Bosch HSS Bi-Metal Holesaw 89mm Diameter
BOSCH Hole saw HSS-Bimetal for standard adapters 168 mm,6 5_8" - merXu