Created to be used which has a hammer, the tip in the slogging spanner is thick to allow the fastener to get tightened to a particular torque. They're great to use if the fastener is stuck and desires loosening, and usually are sized among 24mm-210mm. This is another Strange wrench. https://angeloilyij.wssblogs.com/27277051/types-of-spanners-an-overview