Ihlinzeka ngendawo yokubeka yama-dumbbell okuqeqesha isisindo samahhala ekuqeqesheni okuphambanayo, indawo ye-2-Tier yamapheya angu-10 wama-dumbbell angu-20 anesisindo esijwayelekile, nesikhala esengeziwe ngaphezulu sivumela ukugcinwa kwezinsiza ezisizayo njengamabhola okuqina, amabhola emithi, njll. Ngenxa ye-DHZ's uchungechunge olunamandla lokuhlinzeka nokukhiqiza, uhlaka lwesakhiwo semishini luqinile futhi lunewaranti yeminyaka emihlanu.
