Concrete products:
1. Socket contacts gauge (BS1363Figure 12), it is a standard measuring device to check if it is connected as a test sample.

2. Socket do not contact gauge (BS1363-2 Figure 14): it is a standard measuring device to check if it is not connected as a test sample.

3. Transversal stress test gauge (BS1363-2 Figure 15): By simulating the bolt to insert into the socket test samples and imposing the prescribed weight force (poise) at the stated point to check whether the socket fits to the standard requirements.

4. Grounding minimum pull out force gauge (BS1363-2 Figure 16a): By simulating the grounding bolt insert into the socket test samples and imposing the prescribed vertical downward force (poise) to check whether the socket is fits to the standard requirements.

5. Diversion jack minimum pull out force gauge (BS1363-2 Figure 16b): By simulating the bolt of the firing line or zero line to insert into the socket test samples and imposing the prescribed vertical downward force (poise) to check whether the socket is fits to the standard requirements.

6. Socket and jack gauge (BS1363-2 Figure 11 or BS1363-1 Figure 11): Socket test samples through using the gauge to check whether the relative position of the hole, the size and depth of the hole, and whether the socket joint surface had fit to the standard requirements. There are two specifications of the go gauge, large and small.

7. Plug location and size gauge (BS13631 Figure 5). Plug test sample uses the gauge to check whether the relative position and the length of the pin as well as its joint surface with the plug whether it is fit to the standard requirements.