4 Replacement Parts Base Gear Spare Part for Magic Bullet (top base) You will get 4 top base gear. Also suitable fix for party bullet, baby bullet and Merlin 123 models. How to change Top Base Gear? 1.All base gear in Magic bullet are reverse threaded. If the bottom portion of Magic bullet is round (see above) 1) You need to use your plier or vise as fixed, and turn the screw driver clock wise (if you hold the screw driver on the right hand). If the bottom portion of Magic bullet is flat (see above) 1) You need to use your screw driver as fixed and turn the pier or vise anti-clock wise (if you hold the screw driver on the right hand). 3.(See video Below) Equipment required to change 1) A long flat screw driver (not the star head) 2) A flat-nose plier or vise, Thick Cloth, Mineral oil for lubrication. Any Questions! Message us. We are glad to support you. If your are not satisfied, 100% money back guaranteed! Please give us 5 star rating