Double-wall steel body filled with a specialized fire-resistant concrete composite.
: Turn the dial counter-clockwise (to the left) until the second number aligns with the mark for the 3rd time .
: Turn the dial counter-clockwise (to the left) until the fourth number aligns with the mark for the 1st time .
If you forget your digital code and do not have the override key, the only solution is a factory reset. The SD-103 has no external reset button for security reasons.
