円月輪 / えんげつりん [engetsurin] in Japanese. It literally means 'round moon circle'.
Final Fantasy III

Stats: ATK 110, ACC 85, weight 0, full damage from the back row
Use: ONK, THF, NIN
Treasure: Eureka (guarded by Amon)
Type: Throwing
Final Fantasy IV
Stats: ATK 45, ACC 100, SPD +4
Equip: Edge
Buy: - (sell: 4,500 gil)
Treasure: Sylph's Cave
Final Fantasy V
Stats: ATK +32
Equip: Ninja
Buy: 1,100 gil (sell: 550 gil)
Shop: Phantom Village
Obtain: Fire Ship, Ronka Ruins F4
Final Fantasy VI
Stats: ATK 95
Equip: Locke
Obtain: ?
Description: Steel throwing ring with a sharpened outer edge
Other: Same damage from back row
Final Fantasy VII

Stats: ATK 49, Hit 105%, MAG +12
Slots: 2+2+1, Growth: Normal
Equip: Yuffie Kisaragi
Buy: 6,000 gil (Sell: ?)
Shop: Wutai
Other: same damage from the back row
Other: as 'Razor Ring'
Final Fantasy VIII

Stats: ATK 11, Hit 99%
Buy: 3 M-Stone Piece, 100 gil
Description: A weapon that can be used from a distance and have many advantages. The Pinwheel is one of the more basic projectile weapons.
Other: as 'Pinwheel'. Note that Pinwheel is another weapon entirely from Engetsurin
Crystal Chronicles
Stats: STR +2
Obtain: Daemon's Court, cycle 1
Other: an Artifact
Airborne Brigade

R+
Type: Throwing, Element: -, Growth: Fast, Cost: 13
Attack: 980 (lv1), 3,221 (lv80), 3,489 (lv100), 3,731 (lv120), 3,953 (lv140), 4,160 (lv160)
Defense: 1,050 (lv1), 3,446 (lv80), 3,732 (lv100), 3,991 (lv120), 4,228 (lv140), 4,450 (lv160)
Obtain: Calamity from the Skies
R
Type: Throwing, Element: -, Growth: Fast, Cost: 9
Attack: 660 (lv1), 2,166 (lv60), 2,347 (lv75), 2,510 (lv90), 2,660 (lv105), 2,880 (lv120)
Defense: 640 (lv1), 2,104 (lv60), 2,280 (lv75), 2,438 (lv90), 2,584 (lv105), 2,720 (lv120)
Obtain: Calamity from the Skies
Brave Exvius

Stats: ATK +26
Buy: - (sell: ? gil)
Obtain: Covetous Sleep-talking
Obtain Recipe: treasure in Lanzelut Ruins
Crafting: Silver Ore x5, Crystallized Wind x3, 200 gil, 6 hours
Type: Throwing, Number: 056
Description: A throwing weapon improved by the shinobi
Profile: A disk-shaped weapon that is roughly classified as a chakram. The sharpness of the outer edge, flying distance and other such characteristics have been refined by the shinobi, who specialize in infiltration and assassination. Its power has been raised so it can easily cut tree branches. This weapon is feared as a menace of the battle, as it can fly in from anywhere and deal grave wounds. It is particularly strong against flying enemies.
Other: adds the trait Bird Killer
Pictlogica

Stats (lv1): STR +22
Stats (lv10): STR +40
Buy: - (sell: ? gil)
Obtain: initial equipment on Rinoa
Use: Valkyrie
Type: Blasting Edge, Rarity: ★★, Element: -
Record Keeper

Engetsurin (III)
Stats: ATK +71, ACC 95 (lv1), ? (lv5), ? (lv10), ? (lv15), ? (lv20), ? (lv25), ATK +120, ACC 95 (lv30)
Max Level: lv20 (initial), lv25 (first evolve), lv30 (second evolve)
Type: Throwing, Rarity: ★★★★★
Other: long-range attack
Other: enables use of the Blow of Magic Destruction Soul Break when equipped by Refia

Engetsurin (VI)
Stats: ATK +33, ACC 92 (lv1), ? (lv5), ? (lv10), ? (lv15), ? (lv20), ATK +64, ACC 92 (lv25)
Max Level: 15 (initial), 20 (first evolve), 25 (second evolve)
Type: Throwing, Rarity: ★★★★

Engetsurin (VIII)
Stats: ATK +44, MAG +75, ACC 95 (lv1), ? (lv5), ? (lv10), ? (lv15), ? (lv20), ? (lv25), ATK +80, MAG +126, ACC 95 (lv30)
Max Level: lv20 (initial), lv25 (first evolve), lv30 (second evolve)
Type: Throwing, Rarity: ★★★★★
Other: long-range attack

Engetsurin (IX)
Stats: ATK +67, ACC 92 (lv1), ? (lv5), ? (lv10), ? (lv15), ? (lv20), ? (lv25), ATK +112, ACC 92 (lv30)
Max Level: lv20 (initial), lv25 (first evolve), lv30 (second evolve)
Type: Throwing, Rarity: ★★★★★
Other: long-range attack
Other: enables use of the Slow Shot Soul Break when equipped
Category: Equipment