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Expert Quality, a selection of metric - sized high speed straight shank twist drills specifically for drilling holes prior to tapping. one drill per card (sizes 4.2 - 10.2mm) and two drills per card (sizes 1.6 - 3.3mm). Manufactured to DIN338 and ISO235/1 Specifications Features and Benefits • Expert Quality • High speed straight shank twist drills specifically for holes prior to tapping • For use with standard ISO metric threads Contents 1 x 8.5mm HSS Twist Drill for 10 x 1.5 Taps