Shimano brake caliper alignment tool

Brake caliper alignment tool Shimano BR-R9270, BR-R8170, BR-R7170 and newer GRX calipers. Measures identical to Y2HW15000, only with a 1.9mm slot in the middle. To use remove wheel, remove pads, clean and reset pistons, loosen screw that attach caliper to frame so the caliper can move freely. Insert wheel with a disc. Caliper should now move and have the disc right in the middle. Tighten caliper to specified torque. Insert pads and pump lever to move them into place. In last picture regular bleed block version, found HERE. Would suggest 6 walls to make the block solid, no supports, no brim.