Lessmann LES451161 End Brush with Shank 12 x 60mm 0.30 Steel Wire The Lessmann End Brushes are fitted with a 6mm shank for cleaning and de-burring in hard to reach areas. They are ideal for the removal of paint and the cleaning of moulds and castings. Also for working on edges and recesses and the inside of bores etc. The Lessmann End Brush With Shank has the following specification: Wire Type: Steel. Diameter: 12mm Wire Height: 20mm Overall Length: 60mm Wire Gauge: 0.30. Max Speed: 20,000/rpm.