The climbing nuts are a type of mobile secure or floating clean, since it is placed by the climber who goes in the head and the one who follows it removes it to be able to use it later on.
They are the most economical type of floating secure and the first to appear in the world of climbing.
At first, only pythons that had to be hammered were used. The climbing nuts were born from the need to be able to climb faster and eliminate the time of placing and removing the pitons.
The first climbing nuts were made of wood and strings with knots were also used.
The first metallic climbing nuts were of large size and incorporated cords or tapes, but soon they incorporated metallic cable to make them more manageable and appeared smaller sizes.
With the evolution of free climbing, there was the need to be able to move through terrain where the climbing nuts were no longer so small and bigger and new designs were emerging.
Currently, bicoin-type climbing nuts are the most widely used
The other design that has been imposed is that of the eccentrics, which are hexagonal shaped metal pieces with faces of different sizes and that allow several forms of placement.
There are more designs, but these two are the most successful and those that have been imposed. In any case, nowadays, apart from the successful design of the climbing nuts, additional criteria are being imposed that help climbers:
The lightness is fundamental and the climbing nuts have been lightened using lighter materials and using hollow metal pieces instead of solid ones.
The edges and corners have been rounded to make placement and extraction more comfortable.
The resistance of the cables and welds has been improved to make them more reliable and resistant.
Finally it is obvious that the color has reached the and that nowadays it is rare to find a game of monochrome fissure. Color coding has been imposed to make it easier to locate the measurement we are looking for among all the material we carry.