Johnson's Stainless Steel Tubular Turnbuckles are forged from grade 316 stainless steel and have bronze toggle nuts to prevent galling under high load. The integral toggle nut (check nut) jaw provides positive locking and ease of adjustment, although it does require tools. The 5115 Swage and Jaw model is sized for 5/32 in. (4mm) wire.
Johnson Marine recommends that the working load not exceed 40% of the listed breaking strengths.