Hand Roller
Keep your roller clean. Do not let glue stick to it.
                   Hand Roller
Keep your roller clean from glue and dirt. Do not let glue stick to it. Use wax paper as a barrier.

A hand roller is a compound simple machine.

It is a tool that places pressure on a surface like masking tape sticking to boxboard.

My roller is in the shape of a cylinder. This cylinder turns around on an axis called an axel.

Most of the time I use my hand roller to place pressure, flatten, or spread something smooth.
Roller Pressure
Wide roller for bigger jobs.