Description
These 3-prong extension clamps are constructed of pressure die-cast zinc alloy and are chrome-plated. Clamps open to about 3 in. They have a recommended maximum grip size of about 2.25 in., and feature double keyed spring-type adjustment screws. Boss head clamps can swing freely, is lockable at any angle up to 360 DEG , and can be used with rods up to 19 mm.
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