The proof is in the performance. The Browning 12 Gauge Invector Plus Full Strut Turkey Choke Tube is Browning's most proven turkey tube ever. Longer with better tapers and a proven constriction design. It looks great too with its stainless steel with black oxide finish. Extended choke tubes provide more room for choke tube geometry, allowing for more gradual tapers and parallel sections that reduce shot formation and promote more uniform patterns. Tight is not enough. The Full Strut is designed to give you a tight, uniform pattern. Uniformity is as important as tightness, as holes and gaps in a pattern can result in bad hits and misses that cannot be explained. Especially when combined with premium ammunition, the full strut has proven to put more pellets with more uniformly in a tight core for more neck and head hits.