Designed for the professional technician who needs the right tool for the job. The kit contains 8-19mm brushes in stainless steel, brass and nylon. Each brush has a 1/4″ hex drive shank for use with standard 1/4″ drivers.; Features and Benefits: Twisted wires for increased cleaning action; For use in automotive, agricultural, industrial and MRO industries; Do not exceed 600 RPM; Each brush has a 1/4″ hex drive shank; Packaged in blow molded case; Includes: 12 Stainless Steel Bore Brushes (#8001-8S – 8mm, #8001-9S – 9mm, #8001-10S – 10mm, #8001-11S – 11mm, #8001-12S – 12mm, #8001-13S – 13mm, #8001-14S – 14mm, #8001-15S – 15mm, #8001-16S – 16mm, #8001-17S – 17mm, #8001-18S – 18mm, #8001-19S – 19mm) • 12 Brass Bore Brushes (8001-8B – 8mm, #8001-9B – 9mm, #8001-10B – 10mm, #8001-11B – 11mm, #8001-12B – 12mm, #8001-13B – 13mm, #8001-14B – 14mm, #8001-15B – 15mm, #8001-16B – 16mm, #8001-17B – 17mm, #8001-18B – 18mm, #8001-19B – 19mm) • 12 Nylon Bore Brushes (8001-8N – 8mm, #8001-9N – 9mm, #8001-10N – 10mm, #8001-11N – 11mm, #8001-12N – 12mm, #8001-13N – 13mm, #8001-14N – 14mm, #8001-15N – 15mm, #8001-16N – 16mm, #8001-17N – 17mm, #8001-18N – 18mm, #8001-19N – 19mm) • 1/4″ Driver Handle with Quick-Lock Coupler (#8002) • Blow-Molded Case