The phrase "metal prongs" refers to sharp or pointed pieces made out of metal that are used for various purposes like holding or securing things together. Full definition
This poop pickup tool boasts metal prongs on the rake to provide quick and easy pickups on grass or sand, and features an attached metal bin to hold even large loads with ease. (petlifetoday.com)
During shedding season a rake - type grooming tool with metal prongs is good at removing the dead hair, then the coat can be scissored down. (akc.org)
In addition to this, it's best to use metal prong collars on dogs that have thick fur. (petcareeducation.com)