Fangrui Product Details Size: 1/4 Inch (6.3mm) In Diameter, 1.5 Inches (38mm) In Length, And 1 Inch (25.4mm) In Usable Length. Marine Grade 316 Stainless Steel: Made Of Marine Grade 316 Stainless Steel, Very Tough And To . Solid-body Construction With A Direct Spring-loaded Ball, A Spring-loaded Ball In The Tip Of The Pin Holds It In Place. : High Shear Capacity Steel Gives Maximum Strength For All Applications. Boat Bimini Top Deck Hinge Or Jaw Slide Clamp Bracket , Boat Tops, Support Poles. Widely Used: Quick Release Sales Are An Economical And Affordable Product That Can Be Used For And Commercial Equipment. Can Be Used For Marine Mounts, Stainless Steel Pipe Clamps, Ship Outfitting, Shipbuilding, Etc. Colour:silver Material:316 Stainless Steel Size: 6.3 X 38mm Package Contents: 4 X Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.