Ref.: P7210727002 Article not available Obut has developed a new striation process creating grooves of a graduated depth (0 to 8/10th mm), carefully positioned to preserve the renowned balancing properties of Obut competition boules. This innovation, coupled with the use of steel of a high internal resilience and a tempering process unique in the world to reduce the effect of interior resonance, provides the Bi-pôle with a remarkable shock absorption capacity, notably on very hard ground, minimum recoil when "shooting on the iron".