This is a top quality racing fork brake by Daytona, forged alloy. For road racers, café racers, bobbers, etc. Stiffens the forks so they do not flex, established much better handling. Easy to install—no need to dismantle the forks!
They were on a Yamaha XS650 I owned, but will fit many other makes and models with same dimensions.
These cost $250 new...and these are as good as new!