Twister Rail Drill Bits - 1-1/16" Fasteners even when subjected to very

even when subjected to very heavy train loads and high traffic

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Twister Rail Drill Bits - 1-1/16" Fasteners even when subjected to veryDescription This 1 1 16 hollow (annular) Twister drill bit makes it versatile for drilling rail in maintenance of way applications. It is built from hi speed steel with a titanium aluminum nitride coating, designed to maintain integrity and quality while drilling rail. According to testing by the AAR, these drill bits maintain a temperature around the drilled hole that is only 35 F higher than ambient temperatures. Thanks to the unique design and