Flexible Back Tacking Strip
Also be referred to as flextrim or ply grip. It can be used to create blind seams and makes it easier to bends round corners and curves.
Use hand pressure to close the strip by hand and then tap down with a hammer or mallet to close fully.
Type - 3 Tooth
Open Size - 12mm (toothed side) x 10mm
It can be purchased by the metre or by the roll