Twister Rail Drill Bits - 7/8" Drill Bits & Sockets Tools In our field testing of

In our field testing of the LDA-40 cordless torque tool

and is easy to replace when it wears down

Easily set torque levels with the LED display for fast adjustments

Nitrocarburization surface treatment for corrosion protection

The kit includes a 1” square drive

Twister Rail Drill Bits - 7/8" Drill Bits & Sockets Tools In our field testing ofDescription 7 8" 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.