高強度・高精度なハードスチール製4.9mmボールエンド。ネジ部長さ7mmのミディアムタイプ。従来製品（T050）よりもボール部表面を滑らかに仕上げつつ、低価格化を実現。

This is a set of 4.9mm ball ends made of strong and high-precision hard steel. The screw part is shorter than the 7mm ones. The ball surface is smoother than that of the conventional one (T050), yet sold at a competitive price.