Analyzing and comparing evidence as small as a fingerprint can be extremely difficult by eye alone. This retractable ridge counter from Sirchie makes it easy to trace and count the ridges on fingerprints, making it a useful tool for field investigators and laboratory technicians. The compact, pen-like design is highly portable, and includes a pocket clip for your convenience. Knurling towards the tip provides a secure grip. The delicate tip deploys and retracts at the push of a button. When the tool is not in use, it sits securely inside the main body for protection.