Seac Rapid Daga Stainless Steel KnifeSeac Rapid Daga is the ideal underwater knife for those who love scuba diving, freediving and spearfishing. It combines all the main features useful for those disciplines. Seac Rapid Daga has a "dagger" blade in 10. 5 cm stainless steel, with a smooth edge and a serrated edge for half the length. At the base of the handle there is a small steel mallet, very useful for making noise by beating it on the tank and attracting the attention of other divers.