The original alloy bar end, the Supreme bar ends have been keeping our team free of internal bleeding for over 10 years now. CNC machined out of 6061-t6 alloy and with a knurled wedge to prevent them from moving. It's worth noting that the Supreme bar ends are also nice and light too (if that's what concerns you). MATERIAL: 6061-T6 alloy. WEIGHT: 62g a pair. SPECIALS: super light wedge design.