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
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Amazon.co.jp: JAINGU Thread Tap TR8/10/12/14/16 Left/Right Trapezoidal Tap Machine Plug Tap HSS Thread Tool, TR14x3 Right Hand : Industrial & Scientific
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