Chuck Letchworth Big C Port Western Bit, 2-InchChuck Letchworth Western Bits The Chuck Letchworth Big C Port bit is made of a heavier and ticker metal to produce a stronger signal without the pain when used correctly. The 4 1/2 shanks are made of stainless steel, the 2 1/2 C port mouth is sweet iron. Mouth size is 5 1/4.Features of Chuck Letchworth..