Turnbuckle for sale in JakartaTurnbuckle is a device used to regulate the tension of a sling rope. The intended sling is Webbing Sling, Rope Sling, Wire Rope Sling, Chain Sling, and other tools that require tension regulation. Turnbuckle is also known as a hard needle and there is also a mention of spanskrup.Turnbuckle is used to regulate tension, therefore turnbuckle is designed with 2 eyes on the right and the left whose function is to link objects to other objects so that tension can be regulated. The eye itself is divided into 3 eye shapes including:Eye - Shaped round holeHook - Hook-shapedJaw - Shaped like a slingshot that has a lock on the end