The main device (symbol) in the Klamry blazon is the clamp. The two main tinctures (colors) are gules and argent.
Red in heraldry is given the name Gules, sometimes said to be the “martyr’s colour”1The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P36. The colour is also associated with Mars, the red planet, and the zodiacal sign Aries 2Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P53. Later heralds of a more poetical nature would sometimes refer to the colour as ruby, after the precious stone.3A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P77.
Argent is the heraldic metal Silver and is usually shown as very pure white. It is also known more poetically as pearl, moon (or luna) 4Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P53. In a sketch or drawing it is represented by plain, unmarked paper 5A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1847, P11.
It is important that a coat of arms be easily recognised and so everyday objects were frequently used as clearly identifiable charges – tools 6Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 69 being a common and important example of these, of which the clamp is typical. Some of these tools are rather obscure to modern eyes, who of us nowadays would recognise a hemp-break 7A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1847, P163, let alone know what to use it for! Nevertheless, for mediaeval peasant it was a clearly identifiable symbol.