
Alloy: Hi-tech carbon steel with a unique temper
Finish: Satin
Hardness: soft
Thanks to the gradual stripes - from 0 to 8/10th mm - and a special tempering process, Bi-poles fall in the 'soft' category, because they absorb shocks and thus have limited rebound.
Yet they are hard on the outside and resist wear and tear like a hard boule.
A soft boule with a tough skin, so to speak.
The patterns do not circle the boule but are on opposite sides.
So you can hold them either way when you throw: the plain side, or the grooved side.