High Speed Steel Twist Drills Drill Number Size 78 Diameter .0160 inch 0.41mm Sold as 1 Pack of 10 Drills Each Weight - 1 oz. These Mini Precision Drills Are Used By Jewelers Bead Makers Model Makers Hobbyists R/C Planes Etc To Drill In Wood, Metal, Plastic, Acrylic Etc To Be Used With Mini Pin Vised And Rotary Tools Etc
