The MZX / M3 Double-Wide Combo Open End Wrench is our most commonly used wrench. The M1 is used for very small specialty frames such as CD and Cap frames and both wrenches are made of magnesium. The double-wide head fits over the entire endplug of the roller for a more secure grip during tensioning. The wrench is extra-long for better leverage and made of magnesium to minimize weight during use. Both wrenches are engineered to allow for fast and easy stretching.
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