When Were Adjustable Pliers Invented?
In 1933, the First “Tongue and Groove” Pliers Were Invented by Channellock, Then Known as the Champion-Dearment Tool Company. Also Called Adjustable Pliers...
In 1933, the first “tongue and groove” pliers were invented by Channellock, then known as the Champion-DeArment Tool Company. Also called adjustable pliers, Channellocks and Multi-Grips (among other names), these specialised slip joint pliers feature serrated jaws set at 45 to 60-degree angles from the tool's handles.
Who invented adjustable pliers?
During his long life, Johan Petter Johansson held no less than 110 patents. Two of the inventions, the pipe wrench and the adjustable spanner, brought him world fame, and are still sold all over the world today.
When was pliers invented?
It's believed the first pliers were invented more than 5000 years ago, around 3000BC, and that they were most likely initially made of wood. They, in time, came to be crafted from bronze, and later from stronger materials including iron and steel.
Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.
