a one-piece block unattached to a wear member, and including a front end, a back end, an upper surface, a bottom surface, a first lateral side and a second lateral side;

a boss channel is formed in the one-piece block and is open at the bottom surface and at the back end;

a lock bore is formed in the one-piece block and extends downwardly from the upper surface to the boss channel, and the boss channel extends in a forward direction from the back end and is open continuously at the bottom surface from the back end to a location of the lock bore;

the one-piece block further including a peripheral edge that projects upon each of the first lateral side, the second lateral side, and the front end; and

the peripheral edge is located vertically between the upper surface and the bottom surface, and the peripheral edge forming a welding interface that is partially perimetric of the one-piece block.