This is the DHK 12mm Hex Adapter for the Wolf and Raz-R (8131-708). Includes 2 pieces. Replaces original 8131-706.
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good price , original plastic. new will last longer
These hex adapters, along with the matching 6mm axles and lock nuts, will fit in the Hunter hubs, replacing the weak 4mm axles. Some wheels with really small lug nut openings won't work. An excellent upgrade. Be careful on the quantity. Some packages list a quantity of 2 while others list 4.