The Chicago Electric stud welder has an MSRP of $99.99, and the two spot welders only up the ante from there. The 240-volt unit retails for $169.99, while its 120-volt counterpart will cost you ...

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For example, Home Depot's cheapest comparative stud welder kit is $147.20, with its cheapest 120-volt spot welder sitting at $179.95. For a 240-volt piece, you're looking at a cost of over $200 .