The phrase "last inch" means the final and most difficult part of completing a task or achieving a goal. It refers to the challenging and crucial steps needed to finish something successfully. Full definition
You can explore the Haida Heritage Centre, visit Balance Rock, take the Rose Spit hike to the very last inch of sandspit, see wild deer, or go on other outdoor adventures. (bcferriesvacations.com)
Otherwise, the virus will climb to your brain and will empty your head to the last inch. (religion.blogs.cnn.com)
In brief, Israelis / Jews are not quite human, there is no distinction between combatants and non-combatants, Israelis are not even stakeholders in the region, except by usurpation, and all of Israel» every last inch» is illegally occupied. (firstthings.com)