The A-32 FlexArm is designed to tap small sizes, but still has the ability to tap up to 9/16". The unit's construction is said to allow the operator to easily line up over the hole. With a working range of 11" to 34", the unit stays perpendicular anywhere it is moved on the table. The S-36 is built with strength and durability in mind, the company says. With a working range of 14" to 51", it can cover a larger area and has a greater ability to tap multi-level parts. A larger motor can also be used with this unit to tap up to 3/4" in steel. The company offers a 30-day trial on all units.