The faithfull 4 piece multi function cutter set is a versatile drill bit set designed for professional tradespeople and contractors requiring multiple cutting solutions in one convenient package. This comprehensive set includes a 6mm rotary rasp, 4-12mm step drill, 8-20mm taper drill and a 12.4Mm countersink, all featuring a 1 4 inch drive for compatibility with standard power drills and drivers. Ideal for electricians, carpenters and general contractors, this multi function cutter set provides the essential tools needed for a wide range of drilling, shaping and finishing applications. The step drills are particularly useful for creating clean, burr-free holes in sheet metal, plastic and thin materials, whilst the rotary rasp excels at enlarging holes and shaping softer materials. The complete set is supplied in a protective metal case, ensuring secure storage and easy transportation between job sites. The 4-20mm size range covers the most commonly required hole diameters for electrical installations, metalwork and general fabrication tasks. Features and benefits: four essential cutting tools in one convenient set 1 4 inch drive fits standard power drills and impact drivers protective metal case for secure storage and transport step drills produce clean, burr-free holes without pilot drilling specifications: min. Size mm : 4 max. Size mm : 20 size: 4-20mm