Pull handles are accesories needed to open up sliding or folding doors, more often used for wooden and crystal sliding doors.
Pull handles may be assamble with or without rose. The shape of these roses (round or square) will depend on the door style or design.
In case of no rose is required the assembly system will be different. Click on this link to read about the two assembly system, SLIK A assembly system for crystal doors and SLIK B assembly system is needed for wooden doors.