The Apple Series Leg Extension / Leg Curl na'ura ce mai aiki biyu. An ƙera shi tare da kushin kafa mai dacewa da kushin idon ƙafa, zaka iya daidaitawa cikin sauƙi daga wurin zama. Ƙunƙarar ƙwallon ƙafa, wanda ke ƙasa da gwiwa, an tsara shi don taimakawa ƙafar ƙafar ƙafa, don haka taimakawa masu amfani su sami matsayi na horo na horo daban-daban.