VistaView CableTec Stainless Steel Hand-Crimp Lag and Stud Turnbuckle Tensioner for 1/8" Cable Railing (Lot of 10) Amount of take-up (length of pipe turnbuckle body) = 4", Pilot hole size for lag = 1/8" T316 marine grade stainless steel for maximum durability, strength and weather protection.