Item Specifics: Material: 416 Steel + BrassHardness: HRC 39-44M4-ScrewsSize :Intermediate connecting rod size: 5x13mm Screw tight adjustable length (between 16-22 mm)Nut diameter : 7.5mm Package include: 10PCS M4-Screws On Oct-19-21 at 23:05:03 PDT, seller added the following information: