The "most comprehensive" expert pack allows you to monitor your first cracks in the three axes: "opening," "shearing," and "offset." It includes the DELTA L1 electronic measurement ruler, the DELTA L2 measurement tool, 10 JC1 gauges for monitoring 5 cracks, 3 JC2 gauges for monitoring 3 cracks in shearing and offset, 25 strike anchors for fastening, and the user manual.