1. Assume that both blades to the right have been torqued to the point of breaking.
2. The 4” blade is twice as long as the 2” blade, so it can also be twisted twice as many degrees before breaking. Torque is always distributed over the length of the weakest part of the blade, but since these blades are of a consistent diameter, the torque is distributed evenly over the entire length of the blades.
3. Breaking strength is directly proportional to the smallest cross sectional area on the blade. The length of a blade has no relationship to its ability to deliver torque. A long blade delivers the same amount of torque as a short blade.
4. If a section of the blade was to be turned down to a smaller diameter, all of the torque would be distributed over only the smaller diameter length. The smaller that length becomes, the more concentrated the torque will become, and as demonstrated in #1 above, the fewer the degrees of twist before the blade breaks.
5. A ballend is really a case of these concepts taken to the extreme. The neck diameter represents the smallest cross sectional area on the blade, and the area where the torque is focused is only a few thousandths of an inch!
   
   Clearly, with practically no degrees of twist, the neck reaches its breaking point and snaps off. Because the degrees of twist were so small, the operator does not feel any yield.

Bondhus® Advantages:

Even Bondhus cannot redefine the laws of physics. All ballends break without warning the operator with the telltale feel of the blade or tip yielding.  In spite of this, Bondhus® ballends are still less prone to breakage.  Why?

• Protanium® Steel is stronger than the steel used by any other competitor.
• Protanium® Steel achieves greater torque than the steel used by any other competitor.
• Bondhus carefully matches the torque capacity of every handle with the torque capacity of its associated blade.