Brake Shoe Adjusting Eccentric
Fits 46-64 Truck, Station Wagon, Jeepster

I have a 1949 4WD Truck. My adjusters are square instead of a hex shape and have a cloverleaf pattern at the bottom of the square. The eccentric side (the side that contacts the brake shoe) looks like these. How do I get them off? I am unable to unscrew them or fold the cloverleaves up. They seem soft and strip easily.