4 Pc Snake / Reptile Speculum Set Herp Tool Stainless Spc101 These instruments are used to prop open the mouths of snakes, lizards, and other various reptiles. Made of Stainless Steel. These are not cheap imitation speculums. Sizes: 1", 3/4", 1/2", 3/8" Set comes with carrying case! 4 Sizes included.