Why Coins Are Engineered with Ridges to Keep Your Hands Safe

Thu, 16 Apr 2026 00:25:20 +0000

# Why Coins Are Engineered with Ridges to Keep Your Hands Safe When you think about coins, you probably picture their smooth edges and round shape — something simple and familiar. But behind this everyday item lies thoughtful engineering designed with your safety in mind. One key feature often overlooked is the deliberate ridges or reeded patterns engraved along a coin’s rim. Far from being just decorative, these ridges play a crucial role in keeping your hands safe from slipping and injury. ## The Science Behind Coin Ridges Coins featuring reeded edges aren’t a random design choice. The ridges serve multiple functional purposes, most notably enhancing grip. Even under wet, oily, or damp conditions, the grooves channel moisture away from your fingertips and reduce slipperiness. This increased friction helps prevent accidental slips, especially when handling small objects like currency.