SLB Roth/MBT Brackets 0.022/0.018 Easy wire changes, low friction & force, and faster treatment ... fills the slot. With truly brackets, there is a lack of control of torque, tip, and rotation, ... time. -The lock not by spring sheel only a wire, it is the lowest friction compare with all kinds ... friction, only one step, cut down the wire, it is a normally bracket your used4. Permit attachment usedWhen you ...