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  • How to tap threads using a drill

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    http://www.ultimatehandyman.co.uk/ shows you how to tap a hole using a cordless drill and a taper tap. This is useful if you have a lot of holes to thread, or if you require holes tapping quickly.

  • Cobalt drills

    55 بازدید

    Cobalt drills are excellent at drilling through hard metals, they can often drill tough metals that a normal High speed steel drill bit cannot drill. Here http://www.ultimatehandyman.co.uk/forum1/ shows the massive difference between a standard HSS drill bit and a cobalt drill bit.

  • HSS Taper Shank Drill Set,HSS Drill Bit set ,Drill Bit

    89 بازدید

    The video shows the production process of drill bits.Our main products are straight shank twist drills, taper shank twist drills, such as 1/2 shank drill,HSS Taper Shank Drill Set, enjoys a high reputation both at home and abroad. http://www.jinlei-drills.com/index.php?route=product/category