The MONUMENT Immersion Heater Spanner with Bar is a single 3 3/8 inch (86mm AF) wrench set designed for use with immersion heaters. Manufactured by Monument, this high-quality hand tool is a must-have for any garage or workshop. Its metric system of measurement ensures precise and reliable results, making it a versatile addition to any tool collection. Free postage and packaging make this product even more appealing for those in need of a reliable and durable spanner for their vehicle maintenance needs.