41/64 Drill Bit, High Speed Steel with 1/2 Shank - hutproducts.com
Precision Twist Drill 021341 | 41/64" Diameter 9" OAL 135 Degree Cobalt High Speed Steel Bronze Taper Shank Drill Bit - All Industrial Tool Supply
BOSCH BL2168 1-Piece 41/64 In. x 6 In. Fractional Reduced Shank Black Oxide Drill Bit for Applications in Light-Gauge Metal, Wood, Plastic - Straight Router Bits - Amazon.com