Precision Twist Drill - Taper Length Drill Bit: Series QC91PM, 4.5 mm Dia, 135 ° Point, High Speed Steel - 78552890 - MSC Industrial Supply
4.5mm Drilling Diameter Titanium Plated Straight Shank Twist Drill Bit 8pcs - Bed Bath & Beyond - 18192421
Synthes 4.5 mm Drill Bit, Non-Quick Coupling
uxcell 12-24 UNC Straight Flute Thread Tap and 4.5mm Twist Drill Bit Set, Titanium Plated 6542 High Speed Steel Drilling Bit Machine Threading Tap - Amazon.com
13pcs 1.5-6.5mm M35 Cobalt Drill Bit Hssco Twist Drill Bit Set 1/4" Inch Hex Shank(1.5/2/2.5/3/3.2/3.5/4/4.5/4.8/5/5.5/6/6.5mm) - Drill Bit - AliExpress
Synthes 4.5 mm Cannulated Drill Bit, Jacobs Chuck, 233 mm