The punch tool is used to cut out a portion of the storage card containing the sample and transferring it into the PDQeX cartridge. The punch tool comes with a pre-attached tip that is capable of performing up to 1000 punches. Replacement tips are also available for purchase.
PDQeX Handbook (pdf)
To take a sample with the punch tool, gently press down onto the card with the metal cutting tip until the punch is taken. A twisting motion will help.
The plastic backing stops the punch from making holes right through the card and will reduce contamination.
Expel the punch(es) into a PDQeX cartridge using the plunger.
For DNA extraction, one to four 3 mm punches can be used.