is a testing machine developed by Johnson & Johnson
and now manufactured by Thwing-Albert
that measures the "handle", i.e.
a combination of surface friction and flexibility of sheeted materials.
Originally it was used to test the durability and flexibility of toilet paper and paper towels.
The test sample is placed over an adjustable slot. The resistance encountered by the penetrator blade as it is moved into the slot by a pivoting arm is measured.