A master link box for use in a continuous track of a work machine, the master link box comprising: a left-hand master link having a first distal surface, a first proximal surface opposite the first distal surface, a first pin bore extending between the first distal surface and the first proximal surface, a first link seal bore, and a first lateral annular recess disposed around the first pin bore and inset from the first distal surface; a right-hand master having a second distal surface, a second proximal surface opposite the second distal surface, a second pin bore extending between the second distal surface and the second proximal surface, a second link seal bore, and a second lateral annular recess disposed around the second pin bore and inset from the second distal surface; a master link pin receivable in the first pin bore and the second pin bore, the master link pin comprising: a distal end; a proximal end opposite the distal end; an outer circumferential surface; a distal annular groove in the outer circumferential surface near the distal end; and a radial projection near the proximal end having a projection surface extending outwardly from the outer circumferential surface; and a master retaining ring disposed in the distal annular groove; characterised in that to assemble the master link box, the master link pin is configured to be first inserted through either the left-hand master link or the right-hand master link and subsequently secured in place by the master retaining ring; wherein the projection surface is configured to abut one of the first lateral annular recess and the second lateral annular recess when the master link box is assembled. a left-hand master link having a first distal surface, a first proximal surface opposite the first distal surface, a first pin bore extending between the first distal surface and the first proximal surface, a first link seal bore, and a first lateral annular recess disposed around the first pin bore and inset from the first distal surface; a right-hand master having a second distal surface, a second proximal surface opposite the second distal surface, a second pin bore extending between the second distal surface and the second proximal surface, a second link seal bore, and a second lateral annular recess disposed around the second pin bore and inset from the second distal surface; a master link pin receivable in the first pin bore and the second pin bore, the master link pin comprising: a distal end; a proximal end opposite the distal end; an outer circumferential surface; a distal annular groove in the outer circumferential surface near the distal end; and a radial projection near the proximal end having a projection surface extending outwardly from the outer circumferential surface; and a master retaining ring disposed in the distal annular groove; characterised in that to assemble the master link box, the master link pin is configured to be first inserted through either the left-hand master link or the right-hand master link and subsequently secured in place by the master retaining ring; wherein the projection surface is configured to abut one of the first lateral annular recess and the second lateral annular recess when the master link box is assembled. a distal end; a proximal end opposite the distal end; an outer circumferential surface; a distal annular groove in the outer circumferential surface near the distal end; and a radial projection near the proximal end having a projection surface extending outwardly from the outer circumferential surface; and a master retaining ring disposed in the distal annular groove; to assemble the master link box, the master link pin is configured to be first inserted through either the left-hand master link or the right-hand master link and subsequently secured in place by the master retaining ring; wherein the projection surface is configured to abut one of the first lateral annular recess and the second lateral annular recess when the master link box is assembled.