Aluminum construction adds increased F.O.C. to arrow build Improved impact protection sleeve strengthens arrow tip from fracturing Increases impact resilience and durability Patent-pending taper lock machining improves strength and concentricity Accepts standard 5/16" broadheads with 8-32 thread Weight: 50 grains Sold in a 12 Pack Fitment: Satin Gray- ACISHOKRL Xtorsion 300 & 350 spine | RIP SS 350 spine Satin Green- ACISHOKRM Xtorsion 400 spine | RIP TKO 250, 300, 350, & 400 spine | RIP 300 & 350 spine | RIP SS 400 spine | RIP XV 250 spine Satin Brown- ACISHOKRS RIP 400 & 500 spine | RIP XV 300, 350, 400, & 500 spine Satin Black- ACISHOKRXL Xtorsion 250 spine | RIP 250 spine | RIP SS 300 spine Satin Blood- Rip SS 250 spine