4 GOOD    Norton Metal & Masonry Depressed Center Wheels Type 27 Features: Benefits: Metal quality aluminum   Ideal for grinding alloys, metals, steels and ferrous metals Masonry sharp silicon   oxide abrasive   carbide abrasive Engineered for all masonry materials such as concrete, brick   Low initial cost per wheel   and asphalt Display case packaging Ideal for on - site and small - unit jobs Promotes walk - in, self service selling and easy re - stocking Wheel Type: Applications: . 045", 1/16", 3/32" Thick   Cutting only, where fast cutting and low kerf loss   Type 27 are desired . Ideal for pipe cutting . . 125" Thick Type 27 Cutting and cleaning root pass welds . 1/8" Thick Type 27 Cutting - off, notching and light side grinding . 1/4" Thick Fast Cut Grinding with low horsepower and electric grinders or Type 27   where low pressure is used . 1/4" Thick Long Life   Grinding with high horsepower machines (3 hp or   higher) Type 27 and heavy pressure; flame cut and other severe applications . 1/8" Thick Pipe Notchers Cutting on the face of the wheel for root pass applications; Type 27 Triple reinforced cleaning weld joints or cutting out weld on pipe repair . 1/8" Thick Foundry Notchers   For grinding steel and dirty/scale - Type 27 Triple reinforced covered castings; removing and cleaning gates and risers . 1/4" Thick Foundry Snaggers Grinding on bottom and face of wheel; cleaning parting   Type 27 lines, pads and slag; smoothing weld seams . 1/4" Thick Heavy - Duty     Most aggressive foundry applications . Foundry Type 27 Triple - reinforced 1/4" Thick Saucers Type 28 Smooth, gouge - free grinding at shallow angles . 1/8" Thick Flex, Avos Type 29 Polishing and blending applications . 3 3 3 3 3 3 3 3 3 3 3 3 3 3 GOOD     Gemini Aluminum Oxide Depressed Center Wheels Type 27 & 28 Specification: Benefits:   Gemini Fast Cut Quick stock removal on hard metals Gemini Long Life Exceptional life and cut rate on carbon and stainless steels Gemini Aluminum contain no wax   Grinding aluminum and soft metals without loading   or rubber fillers Ideal for nuclear industry Gemini Stainless Steel   All kinds of stainless steel and various hard alloys   3/32" and 1/4" thick; Pipe and general cut - off applications   contaminant free: no iron, sulfur or chlorine 3/32" thick Grinding Cutting Notching