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The pull handle is where your control comes from — when it wears or loosens, your pulling incision gets sloppy and your scoring pressure inconsistent. This genuine Sigma replacement handle brings back the smooth, accurate motion and steady pressure your Series 4 UP cutter had when it was new, manufactured to exact Sigma specifications for a true fit.
It fits Sigma Series 4 "UP" pull-style cutters — the 4BU, 4CU, and 4DU — and pairs with the Sigma 14U scoring wheel (sold separately). Refresh the handle and the wheel together and an aging cutter scores like it's brand new.
Pro tip: Confirm your cutter model before ordering, and replace the scoring wheel at the same time — a fresh handle on a worn wheel only solves half the problem.