Complete 3-size sphere burr set includes 25mm, 30mm and 40mm diameter ball gouge heads with standard 5/8-11 threads for broad compatibility. High-density carbide steel construction resists wear, stays sharper longer, and handles up to 12,000 RPM for both hobby and professional carving tasks. Designed for direct installation on most 4-1/2 inch and 5 inch angle grinders with 5/8-11 spindles, this rotary burr kit requires no extra adapters or complex setup. The precision threading offers a secure, lowvibration fit, supporting stable control in dry or wet woodworking for smoother, safer operation. Aggressive cutting performance comes from hundreds of sharply formed carbide teeth arranged in a spherical geometry, delivering fast material removal with less effort. The 360-degree cutting surface lets you hollow, contour and sculpt bowls, spoons and organic shapes without constant tool repositioning or changing bits. Optimized for softwood carving, this sphere rotary burr set excels in beech, pine, spruce, linden and other similar species. Ideal for rough shaping, undercutting, hollowing and final surface blending, the balanced design reduces gouging and chatter, allowing smooth freehand detailing and high-efficiency stock removal. Safety-first design emphasizes correct assembly and personal protection. Always retain the grinder's flange nut to maintain balance and reducevibration. Use with appropriate eye, respiratory and hand protection, and thoroughly inspect wood for nails or metal before carving to minimize kickback risk in extended work sessions. Color: Black Material: Alloy Steel Package Contents: 3* grinding head