Easton's 4MM Half-Out Titanium Insert enables the use of common 8-32 thread broadheads in 4MM Full Metal Jacket and 4MM Carbon Injexion shafts. Precision machined from TI-6 series titanium, this half-out delivers high strength-to-weight ratio. Easton's HIT Epoxy is recommended for installation. Features55 grainsPackage contains (6) six insertsExposed length is 0.94"Shank length is 1.20"Made in the USA