KWB Powerbox wood and Forstner drill set 5, 6, 15, 20, 25, 30, 35, 40 mm diameter 706078 (set of 8 pieces forged drill bits in accordance with ISO 7483 G) - - Amazon.com
V VONTOX Forstner Drill Bit 6pcs (15-20-25-30-35-40mm) Titanium Alloy Steel Woodworking Hole Saw HSS Drill Bit Sets, Woodworking Hole Saw Cutter Set, Hinge Boring Hole Saw for Wood Plastic Plywood - -
INTOO Forstner Bit Set 3Pcs Hex Shank,1-1/2",1-5/8",1-3/4" Multi Sided Shank Wood Drill Bits Se - - Amazon.com
1-9/16" Forstner Bit - - Amazon.com
Amazon.com: FAMAG 1663505 Forstner Drill Bit Set HM-Bormax3 5-Piece, Satz 5tlg. D=15,20,25,30,35mm : FAMAG: Industrial & Scientific