This is a Redland Heathland Third Round Hip Tile without nail holes, it can be dry fixed, mortar bedded only or mortar bedded and mechanically fixed. When hip tiles are mortar bedded and mechanically fixed, use the Mortar Bedded Fixing Kit (9314). The hip tile is available in two versions, either with or without nailholes. Use the hip tile with no nail holes when using Uni-Vent Rapid Ridge/Hip. A Block End Hip Tile or a Hip End Cap must be used at the eaves when using dry hip systems.