Extendable reamer, hull hole opener, drill bit, DIY tool with size indicator for RC model airplane, boat, car

[SIZE INDICATOR]: The tip features a size scale indicator, allowing for quick and easy reopening without the need for constant measuring and checking.

[Material]: Made of high-strength steel, wear-resistant and not easily deformed.

[Features]: The handle is hollow and lightweight for easy carrying. The knurled surface treatment provides a good grip and anti-slip properties.

[Application]: DIY tool for RC car and airplane models, used to make exhaust holes, body pillar holes, air vents, etc.