fixing screws. very convenient, the key remains trapped when the block is opened. wide passage for the wheel. mounting - 5 minutes so it's simple.
he really robust air, I even found the very heavy block when I took over.
For me it is nickel. I coupled with abuse string (Abus Amparo 6Ks 4850/85 Theft Black) that locks together. perfect for stops minutes or take the bread.