Check the listing for details. REVERSIBLE TAPPING ATTACHMENT MT2 Shank M3 - M12 For Accurate Threading. Condition: New. Listed at 175.99 USD. Turn your drill press into a tapping machine. Adjustable internal clutch mechanism lets you tap 1/8" – 1/2" (M3 – M12) threads.SPECIFICATIONS:Arbor: MT#2Jaw Type: 3-Jaw, Spring-LoadedMaximum Speed: 700 RPMConstruction: High Carbon SteelSteel Hardness: 46-56 HRCOverall Length: 9" (225mm)Stop Lever Length: 8-3/4" (220mm)Reverse Type: Auto ReversingTypical Concentricity: +/- 0.001"Head Diameter: 2.750" (70mm)Tapping Capacity (Metric): M3 to M12Tapping Capacity (SAE): 1/8" to 1/2"Drill Chuck Capacity: 13/32" (10mm) REVERSIBLE TAPPING ATTACHMENT M 3 - M 12 A very versatile attachment designed for drilling machines for drilling through and blind holes/ drill with standard taps.The automatic reverse mechanism has a double back out speed and the adjustable friction clutch to avoid breakage of taps.Available in MT2 Shank . Offered in different Tap Holding Capacities. Please see my other listings to find it in other shank sizes and larger capacities.DIA - 1/8"-1/2" / M3 - M12