•     optimal screw locking during the active treatment phase
•     built-in stops prevent the screws from coming apart once maximum expansion has been obtained
•     reliable activation/deactivation of the screw with a clearly perceptible click after a 1/4 turn
•     no accidental reversing when pulling out safety key during activation
•     minimal dimensions with a maximum expansion range
•     permanently laser marked arrow on the body of the screw indicates the opening direction and max. expansion

expansion screws offer many advantages:

• Versatile, multi-functional expansion screw.
• Solder-free - little risk of allergies.
• Made of stainless steel.
• Break-resistant retention legs.
• Laser markings of directional arrows and maximum expansion.