This ideal marker marks and makes creases simultaneously which can be seen on both the front and back of the fabric without leaving any residue.
Hera Tool by Clover - Sewing Notion – Pretty Little Hedgehog
Hera Marker
Notions - Clover Hera Marker - Slim # 4002
5 Reasons Why a Hera Marker is the Best Quilt Marking Tool - Suzy Quilts
Clover Hera Marking Tool – Love Sew
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Tips for Using a Hera Marker
Hera Marker for Applique & Sewing Clover – Clover Needlecraft, Inc.
Use a long Hera maker for marking and creasing fabric and/or paper, The sharp tip one is especially useful for turning and poking out tight corners
Hera Marker
5 Reasons Why a Hera Marker is the Best Quilt Marking Tool - Suzy Quilts