Is this locking clip only safe to use up to 18kg? I have just switched to seatbelt install of our seat as my child is 18kg so too heavy for isofix. Am looking for an easier locking clip than the metal one.

Hi Marie, thank you for your inquiry.  The Exactus locking clip has been independently tested and approved up to 26kg for either rear-facing or forward facing child restraint installation, so you would be fine to use it.  We hope this has helped with your query.