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Amazon.co.jp: Bosch 2608585886 Metal Drill Bit Hss-Co 5, 1mmx52mmx3.39In 10 Pcs : DIY, Tools & Garden
DRILLFORCE (10 Pcs) 1/4in. x 4 in. HSS Cobalt Drill Bits, Jobber Length, Straight Shank, Metal Drill,Ideal for Drilling On Mild Steel, Copper, Aluminum, Zinc Alloy Etc. - - Amazon.com
Amazon.co.jp: ZT-TTHG Stainless Steel, M42 8% Cobalt Twist Drill Bit HSS Twist Drill Bit Set for Hard Metal and Wood Excavation (Color: 25pcs) : DIY, Tools & Garden
Amazon | Aexit 10個HSS-CO 5.3mm x 52mmチップストレートシャンクツイストドリルビット(Foret h?lico?dal ? bout droit avec manche de 5 Pcs HSS-CO 5.3mm x 52mm | ツイストビット・金工用ドリルビット