Description: 1 applicator tool and 100pcs rubber dart washers/o-rings. Small size,easy carry and use. Washers help prevent the loosening of metal or alloy shafts by tightly securing the shaft against the barrel. Using the applicator, simply slide a rubber dart washer over the threads on your dart shaft. Compatible with both steel and soft tip darts;A accessory tool for dart lover. Specification: O-Ring Applicator Tool: Material:Brass Color:Gold Length:2.5cm/0.98inch Inner Diameter:0.35cm/0.14inch Outer Diameter:0.5cm/0.2inch Dart Shaft O-Rings: Material: Rubber Color: Black Size (Outer Diameter x Inner Diameter x H) : Approx. 4 x 2 x 1 mm/0.16 x 0.08 x 0.04 inches Package Includes: 1 Piece O-Ring Applicator Tool 100 Pieces Dart Shaft O-Rings Note: Please allow 1-3mm error due to manual measurement. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please kindly understand. Make sure you don't mind before you order.