or on the flat rod 3 1 the sliding means 14 can only be attached on the contact surfaces as shown or extend beyond one and or the other component fastening means 15 or flat rod 3 1 covering it entirely or partly not shown for example the fastening means 15 could be completely surrounded and or coated by the sliding means 14 the illustrated sliding means 14 can also be a plastic coating or a silicone layer the fig5 shows a detail of a fastening means or device 16 according to the invention thereby the fastening means 16 is shown in two conditions the illustration on the left shows the fastening means 16 in the unbent condition on which one sees in particular the teeth 4 according to one design of an embodiment of the invention the fastening means 16 can comprise a wall thickness d which is thinner than 0 4 mm preferably thinner than 0 3 mm the illustration on the right shows the fastening means 16 in the form as it is applied in mounted condition without flat rod or clothing strip one sees the way the teeth 4 are pointing upward during a normal assembly these are punched and or pressed into the fabric layers of the clothing strip see teeth of fig4 the teeth 4 according to the invention are designed in such a manner e g by their form and dimensions that they are stable enough in order to be engaged in the fabrics and or plastic layers of the clothing strips the fastening means according to the invention are made of preferably.