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Sometimes there is a need for a non-round hole to slightly enlarge a hole, or cut a short slot. This is where the Drill Saw Rasp comes into its own. The initial portion looks like a normal twist drill, this is followed by a spiral rasp, allowing the Drill Saw Rasp to first drill a hole then be moved sideways in whatever direction is required. TiN coated for extra long life. This small handy box set covers: 3, 4, 5, 6, 6.5 and 8mm. Use in wood, plastics, aluminium etc.
11 April 2016
Great price point but not reliableI bought these to open up a slot to fit a stick tang knife into the handle blank and on the second use both the 3mm and 4mm bits snapped. Granted I may not have the technique down just right, but you'd expect more than one use out of a bit surely? With the X-design of the bits, the actual core is tiny (for the 3 & 4mm bits at least) meaning that the slightest sideways pressure causes them to bend. Given that they're supposed to cut sideways I was admittedly a bit disappointed and had to find a much more labour intensive and less accurate way of finishing the job. Thankfully I still have 4 working bits left though.