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

This M35 step drill worked great! After many different manufacturers have tried drilling holes in 1/4" steel pipe, the "KEY" is to move as slowly as possible. For some reason, many manufacturers advertise these step drill bits as a "high-speed steel-turn This is the quickest way to kill those bits in less than 5-10 seconds. Having used a Dewalt cordless drill and drilled as slowly as possible at max power I have yet to kill a step drill. This one worked great with no damage after 8 1-3/8" holes. The best step drill was the DEWALT step drill (DWA1789IR) here at Revain, but it only drills holes up to 1-1/8".