Bigboss,
Black_nail is correct. You can order clips for your piece--no extra charge. Clips used to be common with hair systems. The downside to clips is that they cause traction alopecia---the hair comes out where the clips are attached to your real growing hair because the the clips pull on the hair. You should be o.k. is you don't sleep with the unit on or do active sports that don't require a helmet that would rub on the hair system. Clips have largely been replaced by tapes and glues which are vastly improved in the last several years.
Regards,
John