Material Stainless Steel 304 Corrosion Proof and Durability Long Life Span For Maximum Package 6 PACK M6 Hook Hook Turnbuckle with Working Magnetic and Fully Polished No Ragged Edges Standard Size Strong RustResistant Body 5 45 Inches Closed and 8 12 Inches Fully Opened and The Inside Diameter of Eyelet Is Nearly 25 Inches Upkeep The Screw Is Detachable Therefore It Can Use Many Times and Corrosion Proof The Screw Tensioners Can Be Lubricated As Needed to Ease Operation Usage Suitable for Tighten Taut Rope Chain Other Rope and Regulate the Elastic Effect Such as Stage Lighting Safe Rope Tent Rope Corridor Rope Clotheslines Hanging Rope Photo Picture Or Paint Exhibition Display Etc