Camco hooks that slide into the slot of a trailer awning. These are used to attach party lights. I have 3 sets: 2 sets of rubber attachments that fit 2 different sizes of slots (1 set still in the unopened package). S-hooks are included. These are $10 per set of 7 hooks. I also have a set of 6 fabric party light holders without s-hooks selling for $6. These cameo sets of hooks regularly sell for $21.88.