This is a new in the box power brake booster depth gauge. 
This tool is used for adjusting the clearance between the brake master cylinder piston and the brake booster push rod on the front of the power booster. 
We welcome your questions. Basic instructions are included. 

  • pOWER BRAKE BOOSTER DEPTH GAUGE.

    ALUMINUM AND STAINLESS STEEL ROD AND TIGHTENING KNOB

    • ALUMINUM GAUGE TOOL
    • STAINLESS STEEL ROD
    • STAINLESS STEEL KNURLED KNOB
    • SHORT SIDE GOES TO MEASURE THE MASTER CYLINDER                             (NOTE THE ROUNDED END)
    • LONG SIDE MEASURES THE BOOSTER SIDE