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Three-speed drill bit advance allows the Model PR-8 automatic feed rail drill to drill through 136-pound rail in less than one minute, the company says. The PR-8 is equipped with a removable coolant tank and hose for directing coolant to drill bits. When using Modern Track Machinery rail forms and index plates, hole accuracy to within 1/32-inch is guaranteed, the company says. This machine is also available for an electric, high-frequency electric or hydraulic power supply.