Features Use with diamond cores up to 152mm. Percussion action for pilot hole, rotary-only for diamond core drilling. Torque-limiter disengages clutch when the core jams Specification Max In Steel: 13mm Max In Wood: 30mm Max In Masonry: 20mm Max Dry Diamond Core: 152mm Blows Per Minute: 0-22,500bpm No Load Speed: 0-1,500rpm Input Wattage: 850w Net Weight: 3.5kg Standard Equipment Drill Chuck, Chuck Key and Side Handle. Warranty