These key seat clamps convert steel rules, combination square blades and straight edges into key seat rules for laying out keyways and scribing parallel lines on round work. They can be easily attached or removed. Made of steel, case hardened, and accurately ground, they are 1″ long x 7/16″ wide (25 x 11mm) and have a 7/64″ (2.8mm) slot width. Available in pairs only.
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