Trend CE/127635 Collet extension 1/2\" shank 1/4\" colletCollet extension 1/2 inchFor use in router tables where there is a limited router cutters shank lng. available. Precision machined one-pce steel body. With a 1/2 inch shank, fitted with a multi-slit spring steel collet and collet nut. Use at maximum speed 18000 RPM. Increase cutter spindle lng. by 50mm. Maximum tool diameter 50mm. Maximum tool cut lng. 30mm. Requires 19mm & 22mm A/F spanners.Specification-Shank size=1/2 inchCollet bore=1/4 inchOverall lng.=85 mmMaximum speed=18000 rpmMaximum tool dia=50 mmMaximum tool cut=30 mm