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Product Description
Expanding bench dog for 20mm holes that uses a standard 1/4-20 hex bolt (min 1.5" long). You will need to order the canonical washer as well: https://www.shapeways.com/product/3BVNJ5T65/conicalwasher?optionId=65249021
Also NOT supplied: 1/4"-20 hex bolt, (optional) washer, clamping knob
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