Savernake DNA BB12 5" BonerClassic All Round, Mid Sized Chef's Knife Savernake DNA BB12 5" Boner National Chef of the Year 2019 winner Steve Groves, Head Chef at the time at Roux at Parliament Square tasked us with the job of designing his perfect boning knife. We felt delighted to accept a challenge. From initial sketches made during conversations with Steve, it became apparent what he needed. He was looking for a knife with a very pronounced upward curve to the blade,