Review on 🔧 CO Z Stainless Steel Drilling Kit: A Must-Have for Multiple Professional Uses by Jorge Kumar

I bought this drill bit to cut two 1 3/8 inch holes in a 16 gauge stainless steel sink. It was necessary to overheat, stain and ignite the work. It took over an hour to cut a 3/4 inch hole, after which I stopped and drove to Harbor Freight and bought a hydraulic die and set of dies to finish the job. For the second hole I used a thinner Klein Unibit step drill (pictured). It cut through stainless steel and created a flawless 1/2 inch hole in less than 20 seconds. This allowed me to apply the hydraulic punch and die shank and move on to the final finished 1 3/8" diameter hole. Bottom line: The helical nature of this bit means the two opposing cutting edges are always running asynchronously. This is supposed to provide a smoother transition between diameters allow, but the actual result drastically reduces cutting efficiency and increases vibration.Moreover, it clearly "goes" I DO NOT RECOMMEND this for 16 gauge stainless steel.