Premium-grade coil springs are precision-wound with controlled tension to ensure smooth operation without binding under compression. In-Hole springs are specifically designed to fit within confined spaces. In-Hole kits include 12 coil springs in 6 different sizes, engineered to operate freely within holes ranging from 3/32 inches (2.4mm) to 1/4 inches (4.7mm). Each spring measures 12 inches (30.5 cm) in length. Kit #2, ID-12, is classified as heavy-duty.

High-tensile spring wire

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These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).