Zona Tools 37150 - 20-Piece High-Speed Steel Twist Drill Set

20-Piece High-Speed Steel Twist Drill Set The Zona High Speed Steel Twist Drill Set includes a plastic dispenser with one each of high speed twist drills in wire gauge Nos. 61 p 80 (.025inch p .053inch). For use in small pin vise and other hand tools that hold wire gauges or in rotary tools with micro chucks.