Turnbuckles are vital rigging devices designed to regulate tension and length in cables, ropes, and structural assemblies. This comprehensive guide details turnbuckle components, body styles, and end fittings, ranging from common types such as jaw–jaw, eye–eye, and hook–eye to specialized closed-body and heavy-duty designs. Learn about materials, finishes, industry uses, installation methods, and safety tips. With the right choice, turnbuckles ensure reliable, precise tensioning for construction, marine, utility, and industrial projects.