how to make a roblox npc model hold an item?

i've searched this up multiple times before and i haven't really found an answer i can follow. do i need to use a rose model, or an actual rose tool? i'm trying to connect it to a standing still npc model. i usually try to put the handle in the npc's left hand, and the actual tool itself in the npc's model itself. the only thing that happens is that the tool disappears.

R6: Extend "Right Arm" Out to any position, while using the Move Tool to position it in the NPC's hand.

R15: Position "RightUpperArm","RightLowerArm", and "RightHand" to correct position (would recommend changing up every single position) Position the Tool in RightHand.