Attack Ring: Square Edge
Symmetrical, so performance is largely the same in left or right spin.
Extremely powerful Smash Attack due to its size, shape and the multiple jagged contact points.
Size provides excellent smash for colliding with opponents, especially with the relatively heavy weight. This also gives it excellent reach to improve consistency - especially against Circle Survivor Defense, for which it is arguably the best offensive counter.
Incredible rotational Smash due to the deceptively well angled contact points and sheer size and distribution allows for high powered hits on otherwise challenging opponents and impressive ability for last-second knock outs. This is generally enhanced by the use of a Heavy Metal Core.
Sloped edges also provide Upper Attack, and in addition to its tremendous Smash Attack power it is also an excellent Upper Attack AR - in fact, it's so powerful it even works to a degree on non-inverted Storm Grip Base.
On Inverted Storm Grip Base, especially in Left Spin, it is so powerful it is able to smash Circle Survivor Defense out of the ring despite its excellent defense against low opponents.
Spikes along the sides of the AR are surprisingly well-angled and mean most hits will land with some degree of focus, making Square Edge a remarkably consistent AR. They do suffer from wear however, though even with significant wear Square Edge remains a remarkably consistent AR.
In addition, the somewhat rectangular shape means that instead of hitting with rounded edges and bouncing away, Square Edge instead can hit with its powerful Rotational Smash, adding to the consistency of hits and the benefit of a Heavy Metal Core.
Recoil is too much for metal-tipped Blade Bases and somewhat concerning on Customize Grip Base Tip, but overall not terribly severe compared to similarly powerful ARs.
Being a non-overhanging AR and being wide makes it one of the most effective Attack Rings when facing Circle Survivor Defense.
Has some of the highest raw power of any Smash Attack AR.
Benefits from a Heavy Metal Core and a when on a high-speed Blade Base such as Defense Grip Base (Tip Inverted) due to the increase to Rotational Smash.
Can use Ten Heavy or Heavy Attack to some effectiveness, however recoil KOs can become an issue against some opponents due to reduction in the flywheel effect usually provided by Wide Defense or Ten Wide.
Overall, Square Edge has massive power output, quite possibly the most of any part in the generation, and has largely manageable recoil to boot. It is for all intents and purposes as well-designed as an Attack Ring could be - like it or not, this is what peak performance looks like.
Weight Disk (Hasbro): Ten Wide
Weight: 14.0g (Takara/Hasbro) | 14.3g (SonoKong G-Blade)
Moderately light weight
Recoil means it is far less effective for spin stealing and survival than those weight disks
Still has plenty of use for Smash Attack, particularly with Attack Rings which are obstructed by Wide Defense.
Can still be used for spin stealing to decent effect with parts that compensate through LAD (Spiral Change Base/Full Auto Clutch Base etc) or by providing a buffer (Dragon Saucer SAR), but is still outclassed.
Spin Gear: Neo Right Spin Gear (Metal Weight Version)
Spin Gear Shells: Neo Right Spin Gear Shells
Weight: 1.15g ea (total 2.3g)
Generally preferred to regular Right shells due to being compatible with all SG-Compatible bases, in particular for being compatible with Neo SG Cores and the Heavy Metal Core.
This means they are a necessity for Compacts, Weight Based Defense, Force Smash, Traditional Upper Attack and Driger V2 Combinations, at least aside from the rare occasions Left Spin is desired for one of these types, in which case Neo Left Shells are preferred.
Overall a crucial competitive part, but thankfully exceedingly common.
Spin Gear Core: Metal Weight Core
Only compatible with Neo Shells.
Has a cylindrical metal part in the centre to add weight
Slightly lighter than Magnecores, which limits its usefulness, even for Attack Types where the small difference between it and other cores in terms of weight means it generally fails to find a niche, or at least fails to stand out as significantly better in most cases.
This does not mean it is outclassed for all setups, however, odds are it provides the right mix of recoil control and speed for some setups, it is just that the difference it would be best by would inevitably be quite small.
Does still work well for Attack Types in general, despite usually being outperformed by other options the difference is quite minimal.
Blade Base (Takara): SG Sharp Base
SG version of Sharp Base.
Tall base, with sharp tip.
Two molds, albeit only minor differences, with the second having smaller tip retention pieces and a reinforced rim in the underside groove.
Incredibly poor stability resulting in poor longevity against all opponents
Niche use in Defense combinations aiming to maintain high RPM, but Weight Based Defense and Compacts both do this better, and in any case there are better alternatives, such as Customize Metal Sharp Base. This may nonetheless be the closest thing this Blade Base has to usefulness and one of the only historical uses for it.
Outclassed for everything, generally severely so.
Blade Base (Hasbro): SG Semi-Flat Base
The Hasbro version of Manta Diver always includes SG Semi-Flat Base
SG version of Semi-Flat Base.
Tip is slightly differently angled from Semi-Flat Base, being more shallow. Wears quite quickly.
Semi flat tip is nice, being predictable and not difficult to use, but Metal Change Base has better attack, defense, and survival, while Metal Ball Base once worn has a similar but more effective tip shape due to better precession.
It is generally outperformed as a result of these factors.
In addition, Metal Ball Base with Six Metal Balls has a similarly well-behaved tip but 1g more weight.
Nonetheless, it is a competitive part for Compact Customizations as it does work well and they remain competitive using it - just perhaps slightly less capable than with alternatives.
Square Edge is a phenomenal Attack Ring - one of the most powerful Attack parts of any generation and a defining part of the format. Its unmatched brutality and power output leave as large a mark on the generation as it often leaves on its opposition. As such, any Attack enthusiast should own a Manta Diver. However, current scalping and inflation unfortunately means it may be best to look to cheaper alternatives.