Mini MBT 0.022 Hooks 3-4-5. Mini Roth 0.022 Hooks 3-4-5. Mini Roth 0.018 Hooks 3-4-5. Mini Roth 0.022 Hooks 3. The clear central axis, precise torque, angulations and slot size. makes it easier for doctors to operate, and the mini bracket is comfortable for patients to wear.