These drills should be used with a variable speed 850W drill, with clutch. Hammer action MUST NOT be used. Diamond Tipped Core Drills. Fast cutting diamond tipped core drills for near perfect holes in brickwork, masonry, breeze and stone As the tip wears, new diamonds are constantly uncovered to ensure that the cutting edge always remains sharp Drills must be used with an adaptor pack (available separately) consisting of; drive adaptor, pilot spigot and ejector drill Pilot guide pin measures 10mm More information:  | | Drill Accessory Type: | Drill Driver Adapters | For Use With: | Power Drills |
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