OTC's 6982PMC Professional Mechanics Collet Set is designed to remove threaded studs in very tight spaces. It can securely grasp broken studs with as little as 1/4" of material exposed, including frozen or corroded exhaust manifold studs. A variety of collets are included for common applications, ranging from 6mm to 10mm in size to grasp and remove a number of broken bolts or studs. Includes collets in sizes 6mm, 7mm, 8mm, and 10mm, plus collet holder. Durable blow-molded case included. Proudly made in the USA. Value is at the core of the OTC tool and equipment portfolio. For a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it's a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians' productivity and shop profits.