BTB Depth Control Arm
This depth control arm with a 1/32" wide wheel on each end spaces the blade away from
the encapsulated glass and is designed to roll smoothly along uneven (in & out) urethane
surfaces. The arm provides support for the Orange reverse blades to avoid any blade flapping
or shaking. Use the long offset end under the Orange WK4RS blade. Use the short end under
the Orange WK4ZRS & WK24ZRS blades.