2000m long
Hex River Tunnels was created in 1989.
7MM metric hex. Sears has them in the socket hex for $11. Get the long socket hex and cut it to size.
If it has the hex bolts, find a hex wrench that is the right size, cut the wrench approx 2 inches long and find a socket that fits the hex. You can attach your torque wrench to the socket. Been there did that.
A river can be as long as a country! For example the Mississippi River is almost as long as the U.S vertically.
The size is 9mm hex. It needs to be long enough to reach the recessed caliper bolt.
Brandon Hex goes by Brandon Hex.
The river Alt is 28kilometers long.
The Charles River is about 81mi long.
The Missouri River is 2,341 miles long and is the longest tributary to the Mississippi River.
The River Wharfe is a river in Yorkshire, England and is 60 miles long.
the river nile it is 6695 km long
Your local hardware store will have them.