【Technical Advantages】FixltFast 1-1/2 fiberglass reinforced cutting wheel 5-layer progressive hardness design (double-layer fiberglass mesh, double-layer diamond sand, resin adhesive layer), industrial-grade alumina composite material, with diamond particle coating, to ensure easy cutting of various materials with stable performance 【Design Upgrade】 1-1/2 cut off wheels add an iron ring design to the center to improve stability, reduce operating vibration, and make operation safer and more stable; Ultra-thin design (0.045 inches) to reduce friction and minimize burrs, industrial grade resin bonding process extends the life of individual discs by 3 times while reducing cost of use 【Product Specifications】Each boxed product comes standard with 1pcs 1/4" round shank & 1pcs 1/8"round shank with non-slip thread closure technology. With a blade thickness of 0.045" (1.1mm) and a top speed of 45,000 RPM, and a rugged PP storage case, it's lightweight and compact, making it ideal for delicate work in tight spaces 【Wide Application】1.5 inch cutting wheels for rotary tool multi-scene adaptation,suitable for most rotary tools and grinders such as Dremel, Milwaukee, and Craftsman etc.; Suitable for hardened steel, bolts, screws, sheet metal, thin wood, aluminum, and plastics 【Safety Intelligence】The FixltFast 1-1/2 rotary tool cutting discs complies with international standards such as ASM07 and safety requirements. When using a 1-1/2 metal cutting disc, wear appropriate protective gear and do not exceed the specified maximum speed FixltFast upgraded glass-fibre reinforced cutting wheel. Contains 30 glass fiber reinforced cutting wheels and 2 1/8" (3.175mm) alloy steel bushing, which lasts twice as long as regular grinding wheels. With a 1.5" (38.1 mm) wheel diameter and 0.045" (1.1 mm) blade thickness, these highly durable cutting wheels are ideal for cutting, grooving, and trimming a variety of metals, including hardened steel. It is particularly suitable for tasks such as cutting bolt heads, redressing damaged screws, cutting sheet metal or trimming metal rods. These cutting discs are also suitable for delicate projects and can be used to work with other materials, including, plastic, or ceramics