Neiko 4U-L22Q-4YPA Metric M3 To M12 Professional-Grade Tap and Die Set (40 Piece) A must-have tool set for tradesmen and serious do-it-yourselfers Professional-grade set in special high-carbon alloy steel for excellent strength without brittleness Includes both fine- and coarse-threaded taps and dies in Metric-sizing M3 to M12 taps and hexagon die with thread-pitch from 0.5mm to 1.75mm