Feature:1. 6mm D Type Hole: The drive gear with a 6mm D centre hole enables a strong positive driving force to deal with heavy torsion.2. Steel Structure: Forged with premium steel material with sturdy structure, these durable sprockets have excellent strength.3. Firm Supporting: Use in combination with 6mm D shaft, U beam, flanged ball bearing and so on, offering you reliable support.4. Extensive Using: Can be flexibly applied in in various mechanical equipment, robot, etc., a set of practical steel sprockets.5. Easy to Install: With small size and light weight, the installation is very simple, and can be quickly completed.Specification:Item Type: Steel SprocketMaterial: Stainless SteelSurface Treatment: Black galvanized. Number of Teeth: 10Pitch: Approx. 8mm / 0.31inHole Type: D hole. Hole Diameter: Approx. 6mm / 0.24in.Package List:3 x Steel SprocketNote:Match the right size before use.