The No. 4000 Curtain Fastener Cutter, made by C.S. Osborne & Co., are heavy-duty, professional-grade hole punching pliers designed to cut perfect holes for Lift-the-DOT sockets. This tool is a massive time-saver: it eliminates the need for a mallet, punch, or cutting block. A simple squeeze of the handles is all it takes to prep your fabric for the fastener.

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