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The Shapeoko Essential Clamps are for those who want reliable, cheap, and replaceable workholding. These glass-filled nylon clamps are designed to firmly hold your project down while being inexpensive enough that no tears will be shed if one gets damaged.
Are these strong enough?
Essential Clamps are injection molded from glass-filled nylon, which gives them plenty of strength. Because they're injection molded, the plastic is strong and uniform all the way through, unlike 3D printed clamps that tend to fail along build layers.