In sheet metal die making, the final step before a tool enters production is verifying that every safety guard and access panel is correctly latched and every moving slide is in its home position. The auxiliary contact block sits directly on the die-protection interlock switch, converting the mechanical lock state into a clear electrical signal. When the operator closes the heavy press gate, the contact block confirms the latch is fully engaged; if the gate is ajar or a slide is out of position, the signal halts the press cycle before the ram descends. On automated transfer dies, the same block monitors the position of each segmental die insert, ensuring the correct insert is in place before the press can stroke. The block’s compact footprint allows it to be mounted inside the die shoe itself, where space is measured in millimeters and every millisecond of signal response counts. In adjacent motor-vehicle stamping lines, these blocks are fitted to quick-change tooling carts, verifying that the die is fully seated on the bolster before the press can be enabled.