Firepower 5 Pack Aluminum Oxide 0.63 in 36 Grit Grinding Wheel Right Drain Walk In Tub Convenient Mail Handling: Includes an Solid Braided Cord Convenient Mail Handling: Includes an outgoing mail tray and a non locking access panel for incoming mail Hammer Function: 3000 BPM impact action tackles masonry and concrete applications Sub Brand N A Series Name N A Application Grinding Material Aluminum oxide Type Type 27 Wheel Type Grinding wheel Grit 36 Diameter (Inches) 0 Fully reinforced with resin bonded aluminum oxide to ensure safety at high speed and to increase bonding and impact strength Designed for use on air or electric powered right angle or vertical shaft grinders Grade A36S Maximum RPM: 13