The Wera 848 HSS Metal Twist Drill Bit in 4mm is one of the most frequently called-upon sizes in metalworking, ideal for M4 clearance holes, general fabrication work, and precision drilling in steel, aluminium, and other metals. The split point tip provides an immediate, centred start, eliminating the need for a pilot hole in most applications. Engineered from high speed steel with precisely calibrated material elasticity, this bit handles the stresses of regular metal drilling with ease, whilst
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