So exactly which side is for tightening and which one is for loosening? It's just a difference in the orientation of the one-sided teeth?

It is just the orientation in the teeth

What makes this superior to the ESP tool they copied?

It's the exact same $3 tool! They packaged it in a very nice 4 color print cardboard box, and included a sheet of really thin, cheap pre-cut foam you'll need to attach to the side of the tool where it lays against your guitar. Note: the cheap foam pad is badly cut, and doesn't quite cover the entire surface. I was only going to use one end, so I cut the foam piece in half, and applied the first piece, then cut pieces of the second section to patch the spots that didn't fit correctly. Note: You'll need to be extra careful, in my situation the foam wasn't thick enough to protect my beautiful nitro Les Paul against the tool. Lightly pressing on the tool (with the cheapo foam properly attached) was enough pressure to damage the finish on my guitar surrounding my volume knobs. Save yourself some grief and get the plastic lift-off tool liked below, that pulls your knobs off cleanly, and is much safer for your finish: https://www.amazon.com/gp/product/B00CRQWMYM/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1

Does it work on strats Side jack?

It will work with a Strat that has a “Side Jack” on the edge of the body. If it has a “Recessed Jack” on the face of the guitar (Fender Style), you’ll probably want to use a socket wrench.

Don't the teeth add dings or scratches on nuts? Seems like an odd design.

One side of the jaws is smooth. The other has rounded serrations that grip the top of the nut. The combination does not scratch the nut.

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Description

🔧 Tune Up Like a Pro — Never Miss a Beat!

BUILT TO LAST - Durable 100% stainless steel construction ensures long-lasting performance and reliability.
COMPACT POWER TOOL - Lightweight and pocket-sized for on-the-go tweaks in studio or on stage.
ULTRA SLIM PROFILE - At just 1.2mm thick, easily access hard-to-reach volume knobs and tight spaces.
SCRATCH FREE CONFIDENCE - Soft microfiber suede backing protects your gear’s finish from scratches and scuffs.
PRECISION GRIP ZERO SLIP - Precision-cut teeth lock onto round screws for flawless adjustments every time.

The MusicNomad Premium Spanner Wrench MN224 is a compact, hand-powered tool crafted from 100% stainless steel with precision-cut teeth for secure grip on round screws. Its ultra-thin 1.2mm profile allows access under raised volume knobs, while the microfiber suede backing prevents scratches, making it an essential, durable tool for musicians and gear enthusiasts seeking flawless adjustments on stage or in the studio.

Specifications

Color	Black
Brand	MusicNomad
Material	Stainless Steel
Item Weight	1.3 Ounces
Item Package Quantity	1
Head Style	Round
Finish Type	Painted
Operation Mode	Manual
Manufacturer	MusicNomad Equipment Care
UPC	857047002777
Global Trade Identification Number	00857047002777
Part Number	MN224
Item Weight	1.3 ounces
Product Dimensions	5.4 x 3.33 x 0.7 inches
Item model number	MN224
Is Discontinued By Manufacturer	No
Style	MusicNomad
Finish	Painted
Pattern	Wrench
Power Source	Hand Powered
Batteries Included?	No
Batteries Required?	No
Warranty Description	Limited warranty for 30 days from date of purchase music nomad will replace the product at no charge due to any defect in materials or workmanship that may occur in normal use. the warranty does not cover damage that results from abuse, misuse or accidents. to obtain warranty email us at infoatmusicnomad.com for warranty claim instructions.

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