For use in router tables where there is a limited router cutters Shank length available. Precision machined one-piece steel body. With a 1/2 inch. Shank, fitted with a multi-slit spring steel collet & collet nut. Use at maximum speed 18000 RPM. Increase cutter spindle length by 50 mm. Maximum tool diameter 50 mm. Maximum tool cut length 30 mm. Requires 19 mm. & 22 mm. A/F spanners. Shank size=1/2 inch. Collet size d=1/2 inch. Overall length=72 mm. Maximum speed=18000 rpm. Maximum tool dia=50 mm. Maximum tool cut length=30 mm.