A buckle connector for releasably connecting a first object to a second object is provided. The buckle connector may include a first clip member and a connector for connecting it to a first object, and a second clip member and a connector for connecting it to a second object. Legs defining opposed grooves are provided on the first clip member and the second clip member is receivable in the grooves. A stop surface is provided on the second clip member and is engageable with a stop surface on the first clip member to prevent relative movement between the first and second clip members, in a first direction. A strap may be connected to the second clip member so that the strap may be positioned in the grooves in the first and second legs on the first clip member before the second clip member is positioned in the grooves.

A closure element for a fire-protection sleeve is disclosed. The closure element has a body, a connecting element, and at least one locking element for a form-fitting connection to an intumescent strip. The body and the connecting element are designed in one piece.