The right protective equipment for the most repellent rock cracks. The Ball Nuts were invented in 1987 by John Middendorf and were initially called Lowe Balls. They are the true secret weapon of the climbers of self-securing tours. In fact, these are small miracles that do not fear the narrowest rock cracks with parallel surfaces, where the only alternative would be to hook. They are also ideal in the "pin scars" (cracks caused by constant hook impact and removal) and in the small concavities in which even the most modern Microcam cannot do anything. In short: the most experienced fans of classic climbing tours should always have a pair of ball grooves (e.g. numbers 2 and 3) with them due to their extreme lightness. - Details: - circumference: 8 mm - 14 mm - breaking load max. 8 kN - EN 12276 & UIAA 125 certified...