RT-807 SPIN / SPIN AIR PNEUMATIC TREADED INSERT TOOL WITH AN ADJUSTABLE CLUTCH & 4-40, 6-32, 8-32, 10-24, 10-32, 1/4-20, 1/4-28, 5/16-18, 5/16-24, 3/8-16, & 3/8-24 SET-UPS, IN A RUGGED HARDSHELL CASE.