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Set of 8 metric double-ended ring spanners (also called wrenches) are designed for use with hexagonal metric nuts and bolt heads. Chrome-plated chrome alloy steel construction provides durability. The offset ring provides improved access to recessed and hard-to-reach areas. The spanner has a 12-point opening that fits onto the fastening at more angles for improved access in areas with limited swing range. The set includes eight double-ended ring spanners in the following sizes: 6 mm x 7 mm, 8 mm x 9 mm, 10 mm x 11 mm, 12 mm x 13 mm, 14 mm x 15 mm, 16 mm x 17 mm, 18 mm x 19 mm, and 20 mm x 22 mm