2pcs Piano Hammer Sanding Board Grinding for Piano Tuning Maintaining Accessory

Features:
Sanding board, designed for piano felt hammer sanding and maintaining.
S-shaped board design for easier sandingthe margin of the felt hammer.
The sanding paper stick to the surface tightly, durable for lasting use.
The board length is 15.5cm/6.10inch and the width is 2cm/0.79in.
Great accessory for daily piano maintaining.