Turnbuckle Eye & Eye - 10mm - Stainless Steel Marine Grade 316 Stainless Steel 10mm Eye & Eye Turnbuckle. Used for a wide variety of commercial tensioning applications. 10mm European Style Open Body Turnbuckles - Stainless Steel Marine Grade 316 material. Complete with locking nuts. MSRP: Was: Now: $9.91 Add to Cart