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weighing just 47 lbs
Environmentally safe mineral lubricant
This 1-3/16” annular drill bit has been manufactured by Trak-Star
Twister Rail Drill Bits - 3/4" Battery Powered Welding Shop for all your railroadDescription 3 4" 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.
