Wac Em 3 Blade Deep Six Broad heads (4 Pack), Silver, 100 Grain Cut on contact, Field point accuracy Its designed exclusively for the Easton Deep 6 Arrow shafts. Deep Six is a size of thread designed for small diameter arrows, and has a different thread pattern. Deep Six is the field proven thread standard for ultra-micro diameter (4MM & 5MM) arrows. Hardened stainless steel construction