Product Info: ZYAS Aluma Cut Carbide Burr Material: High Grade Carbide; ISO Standard:B1225 ANSI Standard: SB-5 DIN 8033 Standard: ZYAS 1225 Head Size(Diameter) : 12mm Head Length: 25mm; Shank Size: 6mm; MOL: 70mm Precision CNC manufactured carbide burrs offer unparalleled rotational balance, service life and performance. we have decades of manufacturing experience, producing the high performance burr on the market. OEM are welcome