High-performance counterbore pot magnets equipped with pre-machined sink holes for flat head screw flush mounting. Sealed steel cup concentrates magnetic flux for stronger holding power, with standard nickel anti-rust coating and optional epoxy waterproof finish. Multiple normal & high-temperature magnet grades available, various standard styles in stock, custom size, hole dimension and coating supported. Perfect for CNC fixtures, automation equipment, workshop tool holders and all industrial mechanical positioning projects, small samples and bulk wholesale orders are available.