What the 3SDR Series Means
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Series: SDR — Sturtevant Richmont micrometer-adjustable, click-type torque wrenches with a fixed square drive.
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Adjustment: You set the torque by rotating the handle; when the preset torque is reached, the wrench emits a tactile/audible click.
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Ratchet: Fixed ratchet head (standard square drive).
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Accuracy: Typically ±4% of indicated value from ~20–100% of capacity, meeting ASME & ISO standards.
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Typical Use: Precise torque control in industrial, manufacturing, and maintenance tightening applications.



