Lucky Reptile Probe Set, 5 probes, SO-3 includes 5 double-ended probes. These probes are used for sexing reptiles and especially snakes. This method usually supplies accurate results and is often the best way to sex the animals properly as a lot of species cannot be sexed from external characteristics. Attention! You can injure the animals when using probes for sexing. The risk is especially high with small and juvenile animals.