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Parts/Tools & workshop/Hand tools & drivers/JConcepts Combo Thumb Wrench (5.5mm/7.0mm) (Black)
JConcepts Combo Thumb Wrench (5.5mm/7.0mm) (Black)
JConcepts

JConcepts Combo Thumb Wrench (5.5mm/7.0mm) (Black)

Part # JCO2556-24.4(5)
Hand tools & driversAircraftLandcraftRotorcraftWatercraft
Fits
Team Associated RC10 B6Team Associated RC10 T6Team Associated RC10 B5Team Associated RC10 SC5MTeam Associated RC10 T5M
Where to buy
$10.20
AMain Hobbies
Seen Oct 12, 2026
$10.20Buy
Prices are as last seen at the store; stock is not tracked.

About this part

The JConcepts Combo Thumb Wrench combines the two most popular sizes for hex nuts in the RC industry. The JConcepts 5.5 | 7.0mm combo wrench has major flexibility packed into a compact one-piece design. The light-weight, machined aluminum wrench is available in blue and black anodized colors and features a dual-end concept. The main hub of the unit has been knurled for finger tip control and features several heavy cuts for increased grip for those, pesky, hard to turn lock-nuts. The sizing is indicated by laser etching on each end and is topped off with JC logo for authenticity.

Features:
  • Convenient combo 5.5 | 7.0mm design
  • Light-weight design, aluminum material
  • Available in blue and black anodized colors
  • Knurled hub for finger tip control
  • Laser etched for size and authenticity

Reviews4.4 · 5 reviews

Chris KeenVerified owneron JConcepts Combo Thumb Wrench (5.5mm/7.0mm) (Black)

This is quite possibly my favorite small tool in my whole box, it is handy and very easy to use! Plus it looks good!

1 found this helpful
Andrew LeaveyVerified owneron JConcepts Combo Thumb Wrench (5.5mm/7.0mm) (Black)

Cutesy little trinket. Works good for a mini b. I’d love one with the right size to hit the shock nuts too. I haven’t really been able to use it much on the 1/10 cars though since it’s a bit too small to get a good grip

Todd GarnerVerified owneron JConcepts Combo Thumb Wrench (5.5mm/7.0mm) (Black)

This is a great tool that’s been extremely handy to keep in my tool bag. It works for 4 of my 5 RCs. It is not long enough to use for the wheels on my stadium truck which have recessed wheel nuts (Schumacher wheels).

David GundryVerified owneron JConcepts Combo Thumb Wrench (5.5mm/7.0mm) (Black)

Neat idea, but a little too small - if you loose your grip, it's sized just right to go flying (like flicking a coin). A lightly longer one that would work on Stadium Truck wheels would be ideal.

LBVerified owneron JConcepts Combo Thumb Wrench (5.5mm/7.0mm) (Black)

I should have bought this a long time ago. It has the two most popular nut sizes and at times will save you from having to take apart stuff to get at a nut vs using a standard nut driver.

What reviewers say

Reviewers generally rate this compact black thumb wrench highly for its convenience and fit in a tool bag. Praise centres on its handiness, ease of use, and the two common nut sizes (5.5mm and 7.0mm), which can avoid disassembly. Recurring criticisms focus on its small size: reviewers find it hard to grip, too short for recessed wheel nuts on some stadium trucks, and too small to reach shock nuts. One reviewer notes it works on mini buggies but struggles on 1/10 cars, and another reports it works on four of five of their RCs. Overall sentiment is positive, with reviewers suggesting a slightly longer version would be useful.

  • + Handy and easy to use
  • + Compact, fits well in tool bag
  • + Two common nut sizes
  • + Can avoid disassembling parts
  • − Too small to grip well
  • − Too short for recessed stadium truck wheel nuts
  • − Too small for shock nuts
  • − Easy to lose grip and drop
Summary generated from the reviews above.

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