A grinder is a general term for a small handheld abrasive tool used in electric grinders, overhead grinders, and electric drills. There are many types, mainly including ceramic grinders, rubber grinders, diamond grinders, sandpaper grinders, etc.

Ceramic Grinding Heads: Made from grain abrasive (usually brown corundum, white corundum, chrome corundum, silicon carbide) bonded with ceramic binder, with a central metal handle. Mainly used for grinding various metals, suitable for bore inner wall polishing and mold correction.

Rubber grinding head: Finer grain sand bonded with rubber binder, used for mold polishing.

Sandpaper Heads: Multiple rectangular sandpaper sheets bonded around a metal handle. Grain size typically ranges from 60# to 320#, used for polishing the inner wall of holes.

Diamond grinding head: A grinding tool for non-metallic materials such as stone and ceramic, particularly a grinding tool with a diamond alloy abrasive body. It consists of a matrix and several abrasive bodies, with several abrasive bodies spaced and fixed in the matrix, and the abrasive bodies also being spaced on the grinding surface of the head. The matrix is made of an adhesive material with certain toughness, while the abrasive bodies are made of diamond alloy material. This utility model features high grinding performance, simple manufacturing, low cost, high quality of grinding processing, and suitability for large-scale grinding processing.