15PCS 10-50mm Forstner Drill Bit Set Hole Boring Bit Hole Saw for Wood

10-50mm 15X/Set Forstner Carbon Steel Boring Drill Bits Woodworking Self Centering Hole Saw. (20mm and below are 8mm shank, others are 9mm shank). Incision resistance is small, improve the drilling speed, chip removal easily.

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