Grim Reaper Broadheads Pro Series White Tail X 100gr 4 Blade All the Pro Series Mechanicals are compound approved for any set-up. They feature the New PRO TIP and Snap Cup design which holds all components in place for easy installation on your arrows. Super strong, razor sharp .035 stainless blades. No O rings , bands, or clips. Blades stay closed out of the fastest bows yet open smoothly on impact! Whitetail Special 100 gr PRO 4-Blade (2") - 2 Cut diameter. The original all around workhorse, 40-degree swept blades for better penetration and our new PRO Series Tip! Features: Compound approved for any set up Easy installation Pro 3-Blade (2") Blades stay closed Open smoothly on impact