If you've been in R/C for several years and have hundreds of dollars in tools already, this post isn't going to be useful for you. If you're just getting started in R/C, maybe you just picked up your first Arrma model and want to know what tools to pick up... this post is exactly for you! Short version: Bondhus 10686 metric hex drivers - (amazon) Bondhus .050" hex driver - (amazon) Dynamite metric nut drivers - (amazon) Tekton 2741 screwdrivers - (amazon) Tekton 3504 needle nose pliers - (amazon) Loctite blue thread lock - (amazon) Permatex White Lithium - (amazon) Hex Drivers Arrma, along with most any other manufacture, usually includes some L hex wrenches. These are usually a pain to use especially in hard to reach areas and do a great job at rounding your hex heads and for those reasons I recommend throwing them away or giving them to someone you don't like. Bondhus makes great tools, offer a lifetime warranty, and make tools here in the USA and offer some very nice priced tools that are great to get started with, like the Bondhus 10686 6-piece set. Which includes 1.5, 2.0, 2.5, 3.0, 4.0, & 5.0mm hex drivers. In addition you'll also want to pick up a Bondhus .050" hex driver. For less than $20 you'll have all your hex screw needs covered and then some. Nut Drivers The tiny 4-way cross wrench isn't bad, truth be told I still use mine every once in a while but have a couple nut drivers makes the work far more easier and quicker. The Dynamite metric nut driver set is a nice set that's going to cover both the 5.5mm and 7mm nuts used on most Arrma models. Screwdrivers You probably likely already have a couple screwdrivers laying around somewhere but if not then the Tekton 4 piece set makes a nice set to cover both slotted and phillips screws. Other Stuff There are a couple more things I'd recommend adding to your R/C toolbox to finish it off. Needle nose pliers, again something you may already have if not any, if not again the Tekton 3504 needle nose pliers for a few bucks will be fine. Blue thread lock, as you'll be using this anytime a screw goes into a metal piece to prevent the screw from backing out. I'm a HUGE HUGE fan of the Loctite blue sticks. You can get the small bottle version but with the sticks you don't have to worry about it leaking, dripping, running, or drying out. It goes exactly where you put it. To finish it off, get some permatex white lithium grease. This offers great lubrication without being overly messy or thick. For not much money you can have pretty much all the tools you're going to need to work on your Arrma RC's that's going to last you a good long time and a toolbox that will go with you as you buy more and more RC's.