Material: Carbon Steel Hole Saw Type: 19mm / 22mm / 29mm / 32mm / 38mm / 44mm / 51mm / 64mm Arbor Length: 4cm / 9cm Package Size: 185 * 95 * 45cm / 728 * 374 * 177in Package Weight: 420g / 1482ozFeatures reverse function, adjustable speed and screw functionalityFeatures 2 sleeve chuck with 11 positions for drilling through various materialsMaximum torque and clutch mechanism