Hanger Fixe 1-Geometry:Rounded inner edge for less wear on the carabiners.Directs the carabiner for an optimal roof work.Conical Washer.Better control of the tightening torque.Three anti-rotation pins.Optimized surface for full contact.Fixe 1-Hanger Features:For bolts M10 / M12 .Weight: 57g (10mm) / 56g (12mm).Breaking strength:25 kN.Material: ecotri zinc plated / 316L stainless steel.Expansion Bolt.Made of 316L stainless Steel, for outdoor environments.ETA Certification.Red depth-installation mark.Fixe1 and Fixe2 hangers exclusively approved with Fixe expansion bolts, thus complying with the standards:EN959, UIAA-123 and EN 795-A.