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

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

Part # JCO2556-14.8(6)
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

Reviews4.8 · 6 reviews

Anonymouson JConcepts Combo Thumb Wrench (5.5mm/7.0mm) (Blue)

Great tool for anyone with a B6. I was looking at the associated short but drivers and ran across this one and I am glad I bought. Has both sizes that I needed. Everyone needs one of these in their tool box!

2 found this helpful
Nathan Cunninghamon JConcepts Combo Thumb Wrench (5.5mm/7.0mm) (Blue)

For the price this is definitely a nice little tool to have around. Ive used this thumb wrench countless times to build multiple ARRMAs & my new Tekno buggy. Well built and seems to be holding up so far. Made from aluminum not sure which kind but so far its been a investment that was well worth it and works in conjunction with my MIP drivers.

JCVerified owneron JConcepts Combo Thumb Wrench (5.5mm/7.0mm) (Blue)

Another tool you should have in your box. for adjusting the slipper clutch, with out removing the rear wheel.

Jay G.Verified owneron JConcepts Combo Thumb Wrench (5.5mm/7.0mm) (Blue)

Mini thumb wrench for 5.5 and 7mm, winner winner!! This stays in my go bag and is so convenient to use. I have different tools, but having one of these is a game change in tight spaces for sure!!

SteveVerified owneron JConcepts Combo Thumb Wrench (5.5mm/7.0mm) (Blue)

I love this tool! It makes adjusting the slipper so much easier without having to find room for a cross wrench between the wheel and gearbox, plus I love the markings on it as it lets you easily see how much adjustment you made. Also makes to easier to get to the top shock nuts where sometimes space for a bigger wrench is limited by a rear wing or the angle on the front shock tower.

What reviewers say

Reviewers consistently rate this aluminum combo thumb wrench highly, with a 5.5mm and 7.0mm pair in one compact tool. Buyers value it for tight spaces, slipper clutch adjustment without removing the rear wheel, and reaching top shock nuts. Several note it is a small, handy addition to a toolbox, particularly for B6 and ARRMA or Tekno builds. One reviewer found the tool short and the handle small, making tight nuts hard to turn, especially with greasy or sweaty fingers, and wished for a longer, grippier handle. Reviewers also praised the markings for tracking slipper adjustments. Feedback is generally positive with one notable criticism about handle size.

  • + Compact, handy in tight spaces
  • + Covers both 5.5mm and 7.0mm sizes
  • + Useful for slipper clutch adjustment
  • + Well built aluminum construction
  • − Handle is small and hard to grip
  • − Short length makes tight nuts difficult
  • − Could be longer and grippier
Summary generated from the reviews above.

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