Features: Also referred to as Double Cut Burrs, Express Cut Burrs are general purpose burrs designed for rapid stock removal and improved operator control. ; Chip size is reduced and lower tool speeds can be used compared with standard cut burrs. ; It may be necessary to alter the running speeds from those shown in the speed chart in order to achieve optimum performance; Harder materials require slower running speeds; Smaller burrs require faster running speeds; Long shank burrs require slower speeds for safety reasons; Apply constant movement and light pressure when using the burr; Running below the optimum speed will cause chipping; Running above optimum speed will cause premature tooth wear; Allowing the burr to become too hot may cause the braze to soften, and cause the head to become detached from the shank; Using tools and collets which have become worn will cause chipping; Do not sink the burr for more than one third of its periphery; Specifications:Head Diameter1/8"Flute Length9/16"Overall Length1-1/2"Shank Diameter1/8"StyleSC-42