Get in Tight With These Buffs. The fine-weave cotton of this mushromm-shaped buff works faster than conventional felt bobs and also lasts longer. The 1/4in. smooth shaft resists slipping in your drill chuck while its plastic ferrule prevents scratching the recessed areas of your workpiece. Max rpm 10,000. The Facer Buffs are used for getting into tighter areas. For 1in. order (13171), for 2in. order (13172), for 3in. order (13173).