Silver-plated keys - Silver-plated nickel silver keys give a softer, warmer sound.

New adjustable thumb-rest and strap ring - A new adjustable thumb-rest accommodates different sized hands helping the player develop proper playing technique. In addition, a strap ring allows for the instrument to be held without extra effort. Firmer screws and a silver soldered ring give this new feature excellent durability.

Pivot screw - The YCL-450M incorporates the same taper screws as YCL-650 that makes adjustments easier than ever.

Second register vent tube - A new register vent tube shape improves pronunciation in the second register. Whereas the YCL-450 needs sufficient air pressure for good response, the YCL-450M offers great response, even with low air pressure, making it easy to play even for children.