Pair these holders with precision carbide inserts to cut fine details and shape small parts. Designed for use in precision lathes, also called Swiss lathes, they fit directly into a tool holder or post—no tool block needed. All are S-code holders, which means the insert is secured with a screw. They’re the most common holder used with positive-rake inserts. Also known as indexable insert holders.

Choose a holder that matches the insert style and inscribed circle diameter (IC) of your insert. Right-hand holders move from right to left toward the lathe chuck. Left-hand holders move from left to right away from the lathe chuck. Neutral holders can cut in either direction.

Pair these holders with a carbide insert (not included) to enlarge existing holes to precise diameters. They’re made to ANSI standards.

Back-boring holders pass through an existing hole to enlarge it from the back of the workpiece, rather than enlarging the hole as they enter. They're often used to make pipe fittings and hydraulic cylinders. Step-boring holders cut multiple different diameters into the same hole, resulting in a stepped shape. They’re often used to make parts for engines. These holders are also known as multi-diameter or compound-boring tools.

Face your lathe and use the direction the spindle rotates to choose an insert holder. Use right-hand holders when the spindle of your lathe rotates counterclockwise. Use left-hand holders when the spindle rotates clockwise.

Carbide holders are more rigid than steel holders, so they vibrate less and leave a smoother finish.

Holders with a coolant hole deliver coolant through the holder from your lathe onto the workpiece to minimize heat.