The 42-8-LF-LN-S-L from Calmark Birtcher is Wedge-Lok with 3 segment, non-shafted design, lock & flat washer, lock nut, lock patch and 2-56 tapped hole. This Wedge-Lok has 5.72 mm (0.225") x 5.72 mm (0.225") profile dimensions and 101.60mm (4.0") length. For cold wall applications.