ADJUSTABLE ROUND DIES - 1 INCH O.D - 4 X 0.5 - ALPS
https://www.toolsnsafety.com/shop/adjustable-round-dies-1-inch-o-d-4-x-0-5-alps-3065
https://www.toolsnsafety.com/web/image/product.template/3065/image_1920?unique=c7c0967
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Carbon Steel Adjustable Round Dies