There are many nit combs on the market, but the most effective ones for lice have long toothed metal teeth. Plastic combs just don’t get everything out.
The narrow tines work to pull lice and nits through the hair for disposal. At The Hairforce we use the LiceMeister nit comb which a great quality nit comb which doesn’t pull or damage the hair, and the one we recommend. If you may need to buy one then this is available in our shop