Includes 20 wheels (test heads)

Disposable plastic test heads (wheels) made of ABS plastic with a shrouded pinwheel. Each test head is individually packaged in a perforated plastic bag for easy application. When the perforation is removed, the coupling projection of the test head is revealed. This projection is inserted into the receptacle of the weighted reusable handle and the test head is removed from the package. After the test is completed, the plastic bag can be placed over the test head again for safe disposal.