A medical testing apparatus and method of use for for penetrating a patient's tissue with an agent, the apparatus comprises an arcuate rail having spaced first and second sides supported by upper and lower arcuate surfaces and an arcuate handle having first and second ends extending from the upper surface of the arcuate rail. A plurality of tips extend substantially from and normally outward as the lower arcuate surface. The plurality of tips comprises alternating blunt tips and reed tips.