The D-Stroyer SD is a performance hunting arrow shaft engineered with proprietary Small Diameter Dual Spine Weight Forward technology. The .203” Small Diameter offers maximum kinetic energy and greater penetrations with less wind drift vs standard diameter hunting arrows. It features K360 carbon weave on the outer construction on the front 2/3 for consistent spine strength and durability. Dual Spine Weight Forward technology delivers a heavier front for tighter groups & better penetration but also has twice the accuracy and unprecedented performance when compared to traditional single spine arrow construction. The Small Diameter Dual Spine Weight Forward arrow shaft that reduces oscillation by 50% vs single spine.