Trend MB/08X1/4TC Mini guided round over radius 4.0mm x 12.7mm Mini Round over Radius 4.0mmMiniature bearing cutters ideal for sign-making, musical instrument building and other small intricate projects.Can be used on wood and plastic.Small bearing allows access to tight spaces and gives sharp corners.The unique design delivers a constant cutting edge that eliminates the need for hand sanding or filing.The tools have miniature bearings fitted which have a limited life of approximately 100 linear metres, after which these consumables will need to be replaced.Specification-D1=12.7 mmC=9.5 mmOverall lng.=46 mmB=4.8 mmR1=4.0 mmShank Diameter=1/4