TJM XGS greaseable shackle rear to suit Holden Colorado RG and Isuzu D-MAX 2011+ vehicles. Shackles are an integral component of the suspension system that attaches between the leaf spring and vehicle frame. As a leaf spring flexes up or down, its length from main eye to shackle eye changes. Since one end is mounted solidly (the main eye), and cannot move, length changes occur at the shackle end of the leaf pack. TJM greaseable shackles allows regular greasing to lubricate the bushes with no dismantling required for access.