directional cooling holes keyhole gullets 13mm conical segmentheight quality bond & diamond Improving speed and life by keeping the diamond matrix cool and also preventing distortion of the steel core. Also indicates the rotation of use and reinforces the label information for the user. cut faster cut longer cut safer DURO keyhole gullets ensure less chipping of the material and a reduction in vibration levels - enabling smoother cleaner cutting. cut smoother cut cleaner Gives extended life and enables longer cutting times for users cut longer cut cleaner The combination of the highest quality synthetic diamond and bond systems enables ultimate speed of cut, life and the ability to cut a broad range of materials cut faster cut longer cut more materials USE THE DUA/C TO CUT steelbars,pipes§ions/sg&greyiron/indianstone/granite/slate/classaandclassbengineeringbricks claypaviors,pipesandtiles/flintaggregateproduct/alllevelsofreinforcedconcrete/concrete/ hardyorkstone quartzite/londonbrick/hardconcreteproducts/kerbs,lintels&beams/castpipes/bricksandconcreteflags handmadebricks/facingbricks/concreterooftiles/softconcretepaviors/sandbasedpaviors/greenconcrete cementscreed/lightweightconcreteblock/hotrolledasphalt/abrasivesandandgritstone/asphaltoverconcrete/asphalt