Fleshlight Dildo Handles are compatible with all Fleshlight and Fleshjack dildos that contain a silicone plug in their base. To use the Boss Dildo Handle with Fleshlight/Fleshjack dildos, first remove the black plugs from the bases of the two dildos/. Fully insert one ribbed post of your Dildo handle into the hole at the base of your dildo, and then insert the other ribbed post into a second dildo.