These are handcuffs used only on special occasions to hold the strongest troublemakers when held or transferred from one location to another.
ATK +5.
[+Bloody Iron Ball]
ATK +10
[+Prison Uniform]
Every 1 refine increase ATK by 2.
[+Shackle]
Every 1 refine increase ATK by 1.
[+Dark Blinder]
ATK +10

[iRO Description]
Handcuffs designed to chain the greater thieves. It's very solid so it can't broken.
Class: Accessory
Requires Level: 10
Usable By: All Jobs
Atk + 5
Set Bonus
Blinker
Thief Handcuffs
Atk + 10
Set Bonus
Bloodied Shackle Ball
Thief Handcuffs
Atk + 10
Set Bonus
Prisoner's Uniform
Thief Handcuffs
Atk + 2 per upgrade level of Prison Uniform up to a maximum upgrade level of 10.
Set Bonus
Shackles
Thief Handcuffs
Atk + 1 per upgrade level of Shackles up to a maximum upgrade level of 10.

More Information on Combo:

• Bloody Iron Ball & Thief handcuffs[1]
• Thief handcuffs[1] & Prison Uniform
• Shackles & Thief handcuffs[1]
• Thief handcuffs[1] & Dark Blinder