Maximum drilling capacity: Steel 13mm / Wood 38mm / Countersink 65mm (Hole saw 127mm). Chuck capacity: 2-13mm. Rotation speed: [revolutions/minute] High speed 0-1,400 / Low speed 0-450. ●Maximum drilling capacity: Steel φ13mm / Wood φ38mm / Countersink φ65mm / Hole saw φ127mm.