When you buy a Katsu/Makita RT0700CX4 router it comes with a 1/4″ collet as standard. To use a wide range of end mills you will need other collet sizes. These 3mm, 1/8″, 6mm & 8mm collets are specially made for the Katsu or Makita RT0700CX4 Compact Routers, they are precision made from Alloy steel.
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