• CR-MO alloy steel for long life • Heavy duty blow molded storage case • Set includes: • 7mm (307M) • 8mm (308M) • 9mm (309M) • 10mm (310M) • 11mm (311M) • 12mm (312M) • 13mm (313M) • 14mm (314M) • 15mm (315M) • 16mm (316M) • 17mm (317M) • 18mm (318M) • 19mm (319M)
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