Let me see, did we not just read the post by Smoke, taking hours to sight in broadheads, my time to sight in broadheads, zero minutes...Anybody that has read anything about broadheads would know the Rocket Steelhead has out-penetrated every broadhead that it was put up against.And I do mean every style, in dead steer hinds,in plywood,and ballistic gel....And as far as penetration, my 75g Rocket Wolverines, with about 100ftlbs of KE will shoot thru both shoulders, usually resulting in a "very short" blood trail...Planter, you can use the bands from braces,or contact Rocket on the web, bet they will send you extra bands, a package of bands are also available from Pro shops.Dnk, got a little leary about the Wasp Jak-Hammer even though I used them for years and killed every animal I shot with them, their blade attachment system was never the best, and their bands I did not like, always used Rocket bands...