Hands down reamers do a far better job of enlarging propeller holes than drill bits. Reamers follow the existing hole better and actually create a round hole, instead of the triangle shaped holes that drill bits tend to make.
This is a 4 step prop reamer 4-5-6- and 7mm. Machined from high carbon steel; the handle is removable for compactness. Small and light enough to fit in your flight box yet tough enough to be a long time friend.
Over all length is 3.125 inches and the handle is 3 inches wide.