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Series 7 fiddle blocks are constructed with a large diameter single sheave and dual in-line sheaves providing the ability to spread oversized line over a greater surface area than fiddle blocks with a double sheave construction. This powerful configuration prevents sheets from crossing and chafing and distributes static as well as shock loads to three axles instead of the conventional two. Delrin or Delrin ball bearing sheave designs are offered with hardcoat anodized aluminum or stainless steel cheeks. All versions work with convenient universal adapters and contain Schaefer's three-way head that allows free swiveling or front/side set positions. Other versions have a snap shackle