The spindle isAn essential accessory to the PosiTestAT Pull-Off Adhesion Tester, it is available in a variety of different sizes, each with different pull-out strengths.
The size of the Defelsko DOLLY14APK100 spindle is 14mm, and the starting pressure is 1.4MPa.

| Spindle size(mm) | Start-up pressure | Maximum pull-out pressure (AT-M) | Maximum pull-out pressure (AT-A) |
| 10mm | 400psi(2.8MPa) | 10000psi(70 MPa) | 14000psi(96 MPa) |
| 14mm | 200psi(1.4MPa) | 6000psi(40 MPa) | 7000psi(50 MPa) |
| 20mm | 100psi(0.7MPa) | 3000psi(20 MPa) | 3500psi(24 MPa) |
| 50mm | 50psi(0.4MPa) | 500psi(3.5 MPa) | 560psi(3.8 MPa) |