5/16 x 4.5 Jobber Drill Bit Norseman - Drill Bits & Saw Blades - Sequoia Outdoor Supply
4.5mm Carbide Drill Bit Amana Tool 463045 for Boring Machines
Precision Twist Drill 301JD5/16 | 0.3125" Diameter x 118 Degree Point Angle x 4.5" OAL Steam Tempered Coated Jobber Length Drill Bit - All Industrial Tool Supply
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