8 Great ways to use a combination square
2. Make a short rule work like a long one
For long layout lines, forget about marking two distant endpoints and then finding a long straightedge or messy chalk line to connect them. Instead, simply adjust your combination square so the rule's end indicates your layout line. Then hold a sharp pencil in the cup-shaped groove at the rule's end and slide the square and pencil together to connect the endpoints.
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