Features: Brass core reduces shaft binding. Disengage from the shaft easily and quickly. Diamond abrasive bonding surface is double plated for strength and long life. Suitable for shaping and drilling tile, glass, stained glass, stone and other hard material. Specifications: Grit: 140-170# Diameter: 3/4" Material: Brass, Chrome-plating Package included: 1 x Grinding Bit Notes: 1. Manual measuring, please allow 1 ~ 3mm error,thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture. .