Boker Plus Tantodashi Neck Knife knives BOP02BO003 on sale now for $41.21. UPC code 788857034972. Overall: 5"; Blade: 2.5" l 440C Stainless l Standard Edge; Handle: Black l G10; Other Info: Full Tang l Lanyard Hole l Thumb Ridge. Two-tone black stonewash and satin finish tanto style blade. Black Kydex sheath with ball chain lanyard. Boxed.