Adjustable Seat Tube Reamer: 25.4mm to 28.575mm (1" to 1 1/8") - Chadwick & Trefethen #28, 00280 Carbon Shell Angle Blades - Made in USA - Bike Recyclery
VAR Expanding Seat Tube Reamer, Black | Bikeinn
Silva Support with handles for a seat tube reamer | Cicli Corsa