JIECHENG Forstner Drill Bits 15mm,20mm,25mm,30mm,35mm 5 Pcs Set,with Carbide Tip Hinge for Wood and Plastic - - Amazon.com
ENT 25100 5-Piece Forstner Drill Bit Set WS Diameter 15-20 - 25-30 - 35 mm - Drill Bits for Easy Drilling of Blind Holes in Soft Wood : Amazon.de: DIY & Tools