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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MusicNomad Premium Spanner Wrench with Microfiber Suede Backing (MN224)

MusicNomad Premium Spanner Wrench with Microfiber Suede Backing (MN224)

Product ID: 96275217

Details

Brand
MusicNomad
Color
Black
Item Length
5.4 inches
Item Weight
1.3 ounces
Material
Metal

🎸Low 1.2mm profile for tight spots

🔧100% stainless steel precision

🧽Soft microfiber suede backing

7.97 OMR

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Description

🎸 Tighten with confidence, protect with style.

TRUSTED BY PROS - Ranked #11 in Guitar Tools with 4.7-star reviews, this wrench is a must-have for serious musicians and tech-savvy gearheads.
COMPACT PORTABLE - Slim, lightweight, and pocket-sized—ready to accompany you from studio sessions to live gigs.
ULTRA SLIM PROFILE - At just 1.2mm thick, it effortlessly slides under raised volume knobs and hard-to-reach hardware.
FINISH FRIENDLY DESIGN - Microfiber suede backing protects your instrument’s finish from scratches and dings during adjustments.
PRECISION GRIP ZERO SLIP - Engineered with precision-cut teeth on premium stainless steel for a rock-solid hold on guitar pots and jacks.

The MusicNomad Premium Spanner Wrench (MN224) is a precision-engineered, 100% stainless steel tool designed specifically for guitar maintenance. Its ultra-thin 1.2mm profile allows access under raised knobs, while the microfiber suede backing safeguards your instrument’s finish. Compact and highly rated, it’s the essential tool for musicians who demand both performance and protection.

Specifications

ASIN	B07HPZFNB2
Best Sellers Rank	#1,763 in Musical Instruments ( See Top 100 in Musical Instruments ) #19 in Guitar Tools
Brand	MusicNomad
Brand Name	MusicNomad
Color	Black
Country of Publication	China
Customer Reviews	4.7 out of 5 stars 2,496 Reviews
Finish Types	Painted
Global Trade Identification Number	00857047002777
Head Style	Round
Item Length	5.4 inches
Item Package Quantity	1
Item Torque	200 N m
Item Type Name	Wrench with Microfiber Suede Backing
Item Weight	1.3 ounces
Manufacturer	MusicNomad Equipment Care
Manufacturer Part Number	MN224
Manufacturer 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.
Material	Metal
Material Type	Metal
Model Number	MN224
Number of Items	1
Operation Mode	Manual
Package Quantity	1
UPC	857047002777
Unit Count	1 Count

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