The Husqvarna 506379625 Transition Bushing is an original equipment manufacturer (OEM) part designed for Husqvarna K750 series power cutters. This essential component facilitates the correct mounting of cutting blades with a 25.4 mm (1 inch) arbor hole onto machines with a 20 mm arbor shaft, or blades with a 20 mm arbor hole onto machines with a 25.4 mm (1 inch) arbor shaft. It ensures secure and precise blade fitment, crucial for optimal performance and safety during cutting operations. Made from durable materials, this bushing provides reliable functionality and extends the life of your equipment.