These are Multiboard snaps for attaching a Ryobi PCL811 hybrid 18V/AC powered fan to a tile.

There are two versions: the directional version is stronger but snaps from the back of the tile, and the hook version snaps from the front of the tile but won't fit flush mounted tiles. Both versions are strong enough to hold the fan and a large battery.Whichever version you choose, print two of them, and snap them in with the arrow pointing up and one of the snaps 2 MU above the other. The fan requires about 12MU by 8MU of free space on your board with anchor points close to the upper snap. If you're using offset mounts, put a pillar or offset snap close to the bottom of the fan (about 2MU below the bottom snap).