Mechanical locking system for floor panels

Building panels provided with a locking system comprising a tongue at a second edge of a second panel, the tongue being configured to cooperate with a tongue groove at a first edge of a first panel for locking in a vertical direction, the tongue groove comprising an upper lip and a lower lip, the locking system further comprising one or more clips attached to the first edge and a downwardly open locking groove formed at the second edge, each clip comprises an upwardly extending locking element, which is configured to cooperate with the locking groove for locking the first edge and the second edge in a horizontal direction wherein:

• the clip comprises a clip body at a rear side of the first panel, said clip body is provided with an inner part, which extends inwardly from the first edge, and an outer part, which extends outwardly from said first edge,
• the inner strip part comprises a fixing element that cooperates with a downwardly open fixing groove, formed on the rear side of the first panel, for locking the clip to the first edge in a horizontal direction,
• the clip comprises a locking protrusion, which protrudes upwardly from the clip body, said locking protrusion is configured to lock the clip to the first edge in a vertical direction,
• the lower lip or the tongue comprises a recess, and
• the locking protrusion is in a locked position positioned in the recess.