Why would I need a Smoothwall Speedplate?

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Some manhole frames are completely smooth inside and provide no attachment point for a Standard Speedplate. The Smoothwall Speedplate works quite well by a series of barbed projections that grab the smooth walls of the frame. The harder you pull up the tighter it grabs the frame.

Product: Smooth Wall Speedplate

SKU: A-MM0330

Resource Link: https://mrmanhole.com/product/smooth-wall-speedplate/
Additional Link: https://www.youtube.com/watch?v=kov68d0j9fs

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