Brush Kit Stainless Steel, Brass, Nylon 38 Pc W/handle 3/8" - 3/4" Quick Release Hex
# 3 Each of Brass brushes: 3/8", 1/2", 5/8", 3/4"# 3 Each of Stainless steel: 3/8", 1/2", 5/8", 3/4"# 3 Each of Nylon: 3/8", 1/2", 5/8", 3/4"# 5-1/2" x 1-3/8" Quick-Release handle with rubberized grip# 6" x 9/16" long Quick-Release extension adapter# 2" long brush area, 4" overall brush length# Chrome plated hex shafts# Maximum RPM is 600 rpm (if used in drill)# Twisted wire design# Perfect for machinists, cleaning parts, deburring, crafts, general tube cleaning