MGS-S20 Flexible Plumbertool 5 Piece Set for 3/8" SnakesA spare Drop Head should be carried. The 1" Grease Cutter and Arrow Spear can be used through the trap if the strainer is removed and hard scale or grease must be scraped off. All tools can be used for undersink work taking into account the length of the run.MGSD-1 Small Drop HeadMGS-MBF Tool Adaptor, Std. PTF-23 1-3/8" Grease Cutter PTF-21 1" Grease Cutter MGSS-1 Arrow Spear