This Bosch PRO Reducing Ring has a 20mm outer diameter and a 10mm inner bore, making it a great match when you need to fit a blade with a 20mm arbor hole onto a saw with a 10mm spindle. The 1.2mm thickness provides a stable, flush seating inside the blade. The 20mm to 10mm reduction is one of the more significant steps down in this range, ensuring compatibility across a broader span of saw and blade pairings. Reliable and precise, it's a simple but essential accessory for any professional working with Bosch PRO circular saw blades. Features and Benefits: • Reduces a 20mm blade arbor hole to accept a 10mm saw spindle • Designed for precise fitment with Bosch PRO Circular Saw Blades • Useful for bridging larger differences between blade and spindle size • 1.2mm thickness for consistent, stable blade seating • Fast and straightforward to fit Specifications: Outer Diameter: 20mm Inner Bore: 10mm Thickness: 1.2mm