Field Logic Rage 2 Broadhead Replacement Blades and tips are expandable and feature revolutionary Slipcam Rear Blade Deployment System, which gives you 3 big advantages. They eliminates deflection, guaranteed fully deployed blades and no loss of kinetic energy. The exclusive Shocklock System holds blades in place in flight and acts as a shock absorber for them. No rubber bands. Stainless-steel instant-cut tip, machined from aircraft aluminum, 3/4 inch in flight blades are .035 thick with a 2 inch cutting diameter. Free practice head included in every pack.