IS Counterbore/Countersink Sets

Freer Tool & Supply’s IS counterbore and countersink sets collection gives machinists and maintenance teams a convenient way to handle common hole-finishing tasks with one organized kit. These sets help you produce clean counterbores for socket head cap screws and accurate countersinks for flat head fasteners—supporting consistent fastener seating, improved assembly alignment, and a more professional finished appearance across fixtures, plates, and machined components.