The Aeroblades Jack Ripper Throwing Knives- Green is great set to train for your next knife throwing competition. The Aeroblades Jack Ripper throwing knife set is well balanced. The blade design features a two tone appearance of black and green. The blades are made of 440 Stainless Steel. The overall length of the Jack Ripper blades are 6.75". The handles are cord wrapped. The set also comes with a nylon sheath.