BONE BUSTING TIP WITH NASTY WOUND CHANNELS! It might seem a little ‘old-school’ today, but the o-ring design is still one of the most reliable expandable designs money can buy. That’s why the NAP Shockwave is still a favorite pick of bowhunters today. It really REALLY works. Tri-vex point busts through bone like a nail gun and the 1-1/4 inch razor sharp diameter blades cause massive wound channels. If you want a great-flying hard-hitting expandable at a reasonable price, the Shockwave gets it done. It’s your money!