The MCS Steel Single-ring Short & Double-ring Long Chainring Bolts each comes in a set of 5 male/female bolts. For the short one the inside measures 4mm when tightened and have a 7mm total height and for the long one the inside measures 7mm when tightened and have a 11mm total height. The long one fits double and triple chainring cranksets. Available in Chrome only.
Size: Single-ring Short / 4mm inside measure when tight / 7mm total height / M8x6mm Bolt / M8x4mm Nut