Stanley Proto's Interchangeable Head torque wrenches feature 125 head attachments

Stanley Proto's Interchangeable Head torque wrenches feature 125 head attachments. The Interchangeable Head wrenches consist of three electronic, two micrometer and four pre-set versions. They come in ¼,- 3/8- and ½-inch drives, with torque values from 25 in-lbs to 250 ft-lbs. The attachments include ratcheting, open-end and box heads in metric and inch sizes. A part-numbering system matches the correct torque wrench to the attachment.

The wrenches allow users to remove the ratchet head and replace it with an open end or box head. The Proto wrenches are designed to allow users to change heads without having to re-calculate torque values. Each attachment is also marked with a recommended maximum torque value.

Three-way red/green/yellow lights and an audible buzzer tell users when the target torque is approaching, met or has been exceeded. Target torque zone is adjustable from 1% to 10% of targeted torque value.

All of the wrenches meet or exceed ASME B107.14M specification.

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