Trend CE/8635 Collet extension 8mm shank 1/4\" colletCollet extension 8mm shankThe new size has an 8mm shank and 1/4 inch collet, and should be used with medium duty routers of minimum 850 watts, use at maximum speed 18000 RPM and maximum cutter diameter 35mm. Increases spindle lng. by 41mm. Maximum tool cut lng. 25mm.Requires 12mm & 17mm A/F spanners.Specification-Shank size=8 mmCollet bore=6.35 mmOverall lng.=64 mmMaximum speed=18000 rpmMaximum tool dia=35 mmMaximum tool cut=25 mm