Enlarging-neck – more spece to hang close spring or power chain.

No Tip/ Self-drilling design – self-drilling, no tip design, improving the efficiency of insertion to avoid any broken tip.

A hole for orthodontic wire – for fixation and traction.

Arc-head and smaller hexagonal head – avoid hurting the soft tissue, shorten the length and height and ground head without rough angle to reduce the feeling of foreign body.

Smooth cervical region – deccreasing residue attachment and inflamed reaction.

Reinforcement screw body – provide larger twisting strength.