Use with diamond cores up to 152mm. Percussion action for pilot hole. Rotary action for dimaond core drilling. Fast drilling in ferro concrete and brick with powerful 850W motor. Torque limiter disengages clutch at preset level. Features- 2 Mechanical Gears- Soft Start- Electronic Power Control- Torque Limiter- Double Insulated for Safety- Anti VibrationSpecifications:Max in Steel: 13mm Max in Wood: 35mm Max in Masonry: 20mm Max Dry Diamond Core: 152mm Blows per minute: Hi 28,800-64,000bpm / Lo 14,400-32,000bpm No Load Speed: Hi 1,800-4,000rpm / Lo 900-2,000rpm Input wattage: 1400w Net Weight: 4.5kg Includes:Drill ChuckChuck KeySide HandleDepth Rod.Carry Case