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Multi-Purpose Drill Bits are suitable for drilling through steel into masonry materials in one operation without changing the bit due to the special cutting edge geometry and the diamond-ground cutting surfaces of the special carbide tip. The titanium carbide is extremely wear resistant. Packaged individually.
Drilling Guidelines | Material | Mode of Operation | RPM up to 1/4" dia. | RPM 5/16" TO 1/2" diameter | Granite/Stone | With Rotary Percussion | 1500 | 1000 | Brick | With or w/o Rotary Percussion | 1500 | 1000 | Marble | With or w/o Rotary Percussion | 1500 | 1000 | Cast Stone | With or w/o Rotary Percussion | 1500 | 1000 | Concrete | With or w/o Rotary Percussion¹ | 1500 | 1000 | Soft Wood | Without Percussion | 2500 | 1500 | Hard Wood | Without Percussion | 1600 | 800 | Ceramic Tile | Without Percussion² | 1800 | 1200 | | Porcelain | Without Percussion³ | 1200 | 800 | | Baked Ceramic | Without Percussion³ | 1200 | 800 | | Glass/Crystal | Without Percussion∞ | 800 | 600 | ¹Drilling in rebar, stop percussion action! ²Apply moderate pressure ³Liquid coolant. Strong pressure ∞Liquid coolant
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