The Omer Mini Laser Knife comes with an Arm Holder Sheath for Easy Use when Diving-or-Spear-Fishing. The Knife is designed by M. Bardi, it features a Black 3.15" (8cm) Blade made in AISI420 Stainless Steel for Strength, Durability and Corrosion Resistance. The Knife has a Squeeze Lock Positive Retention Mechanism for Security in the Sheath. The Blade has a Dagger Tip with One-Full Side Straight Edge and Partial Serrated Edge on the other. The Mini Laser Knife has a Durable, Impact Resistant Plastic Handle Grip with an Eyelet for attachment of a Lanyard or Line.