When the radio is plugged in, the keys are designed to lock in place, allowing you to remove the radio without using extra tools. Removing the radio without the release button may be difficult or may damage the unit. Release button compatible with most rear-mounted Vauxhall radios. Some radios have mounting holes spaced approximately 4 inches and 2 inches apart. If your radio has one or two holes on each side, spaced about 2 inches apart, these tools are suitable. Refer to DIN standard specifications. For some Vauxhall models, four small studs must be removed using a 5/64-inch hex key. Tools are made of metal. Compatible with Opel CD30, CD30 MP3, CDC40 OPERA, CD70 NAVI, CD90 NAVI, Corsa C, Meriva. Easy to use: insert into the holes on the left and right sides and pull outward. Condition: 100% . Color: Silver. Material: Metal. Package Contents: 1 pair (2 pieces) car stereo removal tools. Note: Lighting and display differences may cause slight color variation between the image and the actual item. Measurement tolerance: ±1–3 cm.