Check the listing for details. 100 Grain Archery Arrow Insert 0.244 Inch Brass Arrow Weight Bolt 12pcs. Condition: New. Listed at 17.06 USD. Arrow inserts allow for weight customization by adding or removing weight from the front of the arrow. This adjustment can help fine-tune the arrow's balance, flight characteristics, and overall performance.SpecificationMaterial: BrassWeight: 100 GrainLength: 44mm / 1.73 inchDiameter: 6.2mm / 0.244 inchThread Size: M4x5mm / M4x0.2 inch(DxL)Packing List: 12 Pack x Archery Arrow InsertsAdvantageInserts reinforce the arrow shaft where the point is attached. They provide additional strength and durability to withstand the forces experienced during shooting, especially with high-powered bows.Inserts ensure proper alignment of field points with the arrow shaft. This helps maintain accuracy by ensuring that the or point is properly aligned and flight characteristics.InstructionInserts make it easier to replace points on arrows.