Lumbar & Cervical Kerrisons: These innovative kerrisons are truly unique. MSI takes pride in the manufacturing process that allows for a stronger bite and longer lasting sharpness. This process includes the kerrisons being laser cut from solid metal blocks, and a two-step hardening process, all of which allows for improved fiber structure, higher strength in material, and significantly reduces the risk of cracks and pores in the material itself. The silicone handle and integrated spring lighten the pull action to lessen hand fatigue. These kerrisons open to ensure maximum capabilities for removing debris from the channel of the device.