The Klein 53819 is a knockout punch that is designed for a 1/2-inch EMT conduit. It is also designed to easily punch a hole cleanly and accurately. This reliable punch can cut aluminum, fiberglass, and plastic, making it a multi-tool that help professionals get the job done. It also has a steel gauge of 10. A black oxide finish is added for resistance against corrosion and tarnish. Additionally, it features an overall dimension of 0.891" length, 0.875" height, and 0.891" width. Klein Tools is the world leader in the design and production of the finest and high-quality products. In cooperation with Klein Tools, we at PlumbersStock carry high-quality and reliable products for a very affordable price. Grab yours now here at PlumbersStock.