A fastening device comprising: an anchor level comprising a left first end section, a right second end section, and an anchoring section therebetween for permanent attachment to an anchoring surface; an extender level comprising a left first end section, a right second end section, and an extension section therebetween; a fastener level comprising a left first end section, a right second end section, and a fastening section therebetween for selective attachment to a fastening surface; a folded connection between the left first end sections (31, 41) forming a left first hinge linking the anchor level's left first end section to the extender level's left first end section; a folded connection between the right second end sections (42, 52) forming a right second hinge linking the extender level's right second end section to the fastener level's right second end section; and an integral breakable joint (13/14) joining respective sections of two adjacent levels prior to fastener deployment and breaking upon fastener deployment, wherein the anchor level comprises a right fold between its anchoring section and its right second end section, wherein the integral breakable joint is situated on the right fold between the anchoring section and the right second end section and/or wherein the extender level comprises a left fold between its extension section and its left first end section, wherein the integral breakable joint is situated on the left fold between the extension section and the left first end section, wherein the integral breakable joint joins the extender level to the fastener level prior to fastener deployment. an anchor level comprising a left first end section, a right second end section, and an anchoring section therebetween for permanent attachment to an anchoring surface; an extender level comprising a left first end section, a right second end section, and an extension section therebetween; a fastener level comprising a left first end section, a right second end section, and a fastening section therebetween for selective attachment to a fastening surface; a folded connection between the left first end sections (31, 41) forming a left first hinge linking the anchor level's left first end section to the extender level's left first end section; a folded connection between the right second end sections (42, 52) forming a right second hinge linking the extender level's right second end section to the fastener level's right second end section; and an integral breakable joint (13/14) joining respective sections of two adjacent levels prior to fastener deployment and breaking upon fastener deployment, wherein the anchor level comprises a right fold between its anchoring section and its right second end section, wherein the integral breakable joint is situated on the right fold between the anchoring section and the right second end section and/or wherein the extender level comprises a left fold between its extension section and its left first end section, wherein the integral breakable joint is situated on the left fold between the extension section and the left first end section, wherein the integral breakable joint joins the extender level to the fastener level prior to fastener deployment.