8 Piece, Dog Bone 8 In 1 Wrench Set, Includes: 4 SAE 130-158 & 4 Metric 130-159, Swivel Head For Different Angles & Extra Strong Magnet For Holding Fasteners, Chrome Moly Steel For Strength, SAE Dog Bone Wrench Sizes 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" & 13/16, Metric Dog Bone Wrench Sizes 12, 13, 14, 15, 16, 17, 18 & 19 mm.