The Easton 5mm Match Grade SS #5 HIT Collar 6pk (401192) is a precision-engineered component designed to increase the impact strength of arrows using the HIT system. Constructed from hardened stainless steel, these collars are built to last and provide superior durability. They are available in six sizes to fit all 5mm Easton arrows and are included with Easton Match Grade 5mm arrows. These collars can also be purchased separately for many 5mm arrows on the market. Perfect for archers looking to enhance their arrow performance, these collars fit 5/16 field points.