Chromium vanadium is composed of various alloys and has higher hardness and strength. The ratchet wrench set has 72 teeth and a 12 point double hex driver. [Common Sizes] 12pcs Ratchet Combination Wrench Set includes: 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm.
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