Material:Brass / Metal ;Brass wire diameter?0.13mm
1/4" round shanks it Fits any drill 4500 Max RPM
Solid brass,They are soft enough to clean without wearing away what you are trying to clean.
Designed for easy access into narrow holes and confined areas. Crimped style for light to medium duty applications, Removes rust, scale and paint in hard to reach areas.
Package Included:5Pcs()1x 3"(75mm) brass wheel;1x 2"(50mm) brass Brush;1x 2"(50mm) brass Cups Brush;1x 1"(25mm) brass Brush ;1x 0.63"(16mm) brass Brush