High quality carbide rotary files, ideal for elongating strut holes on many vehicles. Use when installing 82110, 82120,and 87350 adjusters. May be used with 1/4" or 3/8" drills at high speeds. Available individually. Use with 85774 Cool Tool cuttingfluid. Set Includes - #85126 - 1/4" Rotary File MAX. OPER. SPEED:9000 RPM, #85127 - 3/8" Rotary File MAX. OPER. SPEED:9000 RPM, #85128 - 5/8" Rotary File MAX. OPER. SPEED:7000 RPM ......CAUTION: Always wear safety glasses when using cutting or grinding tools and equipment.