The TIG & Stick welder delivers a 40% duty cycle for DC current and 60% for AC TIG welding. According to the product description, the unit has 20% duty cycle at 90 Amps. In fact, pros and cons tell a lot and Saigon Cable give an outlook of the product because they are scanned from the users’ reviews. The controls are a little confusing. The best way to strip the insulation from the wires is to lightly score with a knife on the flat side, i.e. cut half-way through the insulation, not cutting to the wire, then do small cuts between each wire (from the score line to the end), then pull off each little bit of insulation with pliers, being careful not to grip the wire too much and pull the wire out. At this point, you'll need to trim a little bit off the top-left mount because it overlaps with the "SID R" LED.