4 Fedi Periodontal Chisel, #6 Handle 4 Fedi Periodontal Chisel, #6 Handle Sign in to save to your list CPF46 The 4 Fedi Chisel is used for incisions that remove or recontour soft tissue and to excise interproximal tissue with 3.3mm working end at 50 degree angle. Where to Buy Ask a specialist