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
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