No tool needed. Fits over the original headband and zip up in place. Don't need to remove the original headband.
Can be used to cover your wear out headband or protect it from scratch.
This product is compatible with Sony WH1000XM3, WH1000XM2, WH-XB900N, WH-H900N, XB950B1, XB950N1, MDRXB950BT, MDRXB950BT/B, MDRXB950BT/L, MDRXB950BT/R, MDRXB650BT, MDRXB650BT/B, MDRXB650BT/L, MDRXB650BT/R, MDR1000X, MDR1000X/B, MDR1000X/C, MDR100ABN, MDR100AAP MDR100A and other same size headband
Product Dimensions: 5.11 X 3.1 inches (13 X 8 cm)
Package Contents: Headphone headband X 1