a. Teeth number marks are easy for identification
b. Funneled design at mesial entrance for easy wire engagement
c. Round ball hook enhances patient's comfort and avoids gingival irritation
d. Low profile & smooth surface & round corners are enhanced for patients comfort
e. Torque-in-base design techniques to provide level slot line-up, and help avoid occlusal interference
f. Compound contour base anatomically conforms to the teeth and provides proper fit
g. MIM technique ensures compact shape