Bosch, TCW1C450, 4-1/2 x .045 x 7/8, Type 1 Thin Cutting Disc C60R-BF for Concrete/Masonry. Bosch Power Tools and Accessories is one of the divisions within the Robert Bosch Tool Corporation, which is one of the largest power tool and accessory manufacturers in the world. Bosch provides a complete line of corded and cordless power tools and accessories engineered to survive any jobsite and allow professionals to take control of their work. Bosch TCW1C450 4-1/2 x .045 x 7/8 Type 1 Thin Cutting Disc C60R-BF for Concrete/Masonry.Features: Rapido thin cutting wheels provide up to 50% less cutting time and require less force. Excellent for vibration free cutting and no burring to avoid rework Thin Cutting / Rapido Type 1A (ISO 41) Grinding Wheels Wheel Diameter 4-1/2 Inch x .045 Inch Arbor Size 7/8 Inch Max. RPM 15,250 Grit C60R-BF Application Concrete / masonry cutting Tool Type Angle grinder