EQUALIZER® sheath 100mm The sheath is the unique, patented idea that makes the EQUALIZER® line of tools work. The sheath is a protective sleeve that surrounds the blade will not damage the dash or garnish mouldings. Sheaths are available in the three sizes: 10,20 and 30cm. The smallest one is generally used to surround small side windows. The middle size generally suits for the removal of rear windshields or windows. The longest on is used when the windshield penetrates inside the bonnet, which implies to operate below the dashboard. The sheath is curved so that the drive unit is not in contact with the window. This curve prevents any bening of the part of the blade that is outside the sheath. Made in USA. Patented : France 8814584 Germany 3838044 United Kingdom 2212090 Italy 1235142 United States 4955124 Australia 610665 Canada 1293116 Otherpatents have been registered.