Twister Rail Drill Bits - 15/16" Tools Welding 5mm with minimal torque kick-back

5mm with minimal torque kick-back against the operator

and improve productivity

By using this custom reaction arm

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making it suitable for major railway projects

Twister Rail Drill Bits - 15/16" Tools Welding 5mm with minimal torque kick-backDescription 15 16" titanium aluminum nitrate coated Twister annular (hollow) drill bits by Trak Star. Hi speed, premium steel. According to AAR field testing, they keep rail temperatures around the hole 35 degrees fahrenheit above outside temperatures, eliminating thermally activated embrittlement and stress cracks.