Sizes: Diameter 12.0 mm - 30.0 mm Total length 230 mm RATIO Y-Cutter Ergo ATIO tension Shank RATIO Adapter RATIO Extension Shank The Heller Ratio system is a tool system where all the individual components can be combined with one another: StarCutter drill head, RatioQuick core bit, Y-CutterErgo hammer bit and RebarCutter reinforcement drill bit and pilot bit, flute body, extension shank and adapter. Depending on the diameter and desired drill hole depth, the individual components can be combined using the system’s secure screw connections to meet the demands of the job in hand. The precision-manufactured Ratio special thread ensures the tool is securely fixed when in use whilst also allowing easy dismantling after use.The Ratio System facilitates working tool lengths of 1,480 mm – with first-class results.The possible drill hole diameters range from 12 to 160 mm – thus expanding the system’s wide range of possi- ble applications. Ratio HAMMER DRILL BITS 2411 StarCutter Ratio Drill Head Ratio HAMMER DRILL BITS 2211 RatioQuick Core Bits Concrete Reinforced concrete Gas concrete/YTONG Sand-lime brick Clinker Aerated concrete Brickwork Concrete Gas concrete/YTONG Sand-lime brick 8 Power through brickwork – flexible depth and diameter ̈ Excellent drilling performance and long service life thanks to the use of high-alloy special steel ̈ Fast advance even in hard concrete Great depths – drilled quickly and cleanly ̈ Enhanced removal of dust thanks to alternating sequence of flat & pointed teeth ̈ Extremely robust and long service life ̈ Extremely quick advance thanks to edge-grinding of the drill hole Sizes: Diameter 12.0 mm - 30.0 mm Total length 230 mm