ergonomic, the first handle that adapts to the users handsmooth, seamless handle for maximum comforthand & handle interlock causing less strainanti-roll handle designblade manufactured from chrome molybdenum vanadium steelhardened tipped for precision fit1ea - torx : t8 x 60mm, t9 x 60mm, t10 x 100mm, t15 x 100mm, t20 x 100mm, t25 x 100mm