ENGINEER PZ-59 Pliers: Grip the Head a Screwdriver Cannot Turn

The screwdriver fits the recess, but the recess no longer holds it. Another attempt rounds the head further, and an ordinary pair of pliers may slide off the curved outside. ENGINEER’s PZ-59 offers a different contact surface: vertical grooves at the nose designed to grip the exterior of an exposed screw head.

That makes the buying question specific. You need enough head to grip, enough room for the pliers and a fastener suitable for the tool. The PZ-59 is worth considering for recurring disassembly and repairs with accessible damaged heads; its larger body is not automatically the answer to a tiny recessed screw.

Start with the head you can actually reach

ENGINEER specifies a screw-head diameter range of 3–12mm for the PZ-59. That is the outside head size, not the diameter of the threaded shaft. Check the exposed portion and the surrounding space before choosing the tool.

The jaw nose has grooves running vertically, so it can engage the outside of a head instead of depending on an intact screwdriver recess. The maker also identifies low-profile truss heads as an application. “Low profile” still needs something accessible to grip; a screw sitting completely flush or below the surrounding surface presents a different problem.

In a 2018 personal review, Robert Harris describes a demonstration in which ordinary linesman pliers slipped while the PZ-59 gripped and turned the screw. That single demonstration does not establish that every damaged fastener will release. The useful distinction is where the tool takes its purchase.

The larger body needs its own working space

The PZ-59 is 204mm long and weighs 295g, with a 27mm-wide tip. Its carbon-steel body and covered handles create a substantial hand tool. Consider those dimensions against the place you expect to work, rather than treating “heavy duty” as a universal advantage.

A larger grip may suit an open bracket or a dismantled assembly on a bench. The same width can become a drawback behind trim, beside a neighboring component or inside a shallow recess. The handles also need room to move as you maintain the grip and turn.

Before buying for one stubborn screw, look at the whole approach: head clearance, jaw width and hand space. If the head is hidden inside a narrow recess, an outside-gripping tool can be the wrong category even when its size range includes the fastener.

Secondary jaws add value when you use them

Alongside the screw-gripping nose, ENGINEER includes intermeshing side teeth for thin workpieces and a wire-cutting section. The Japanese specification lists capacity for 3.5mm solid copper wire and 3.2mm soft iron wire. Those are material-specific limits, not permission to cut any wire of the same diameter.

These features can make the PZ-59 more useful in a repair kit that regularly alternates between gripping a head, holding a thin part and cutting suitable wire. They are less persuasive when the only task is extracting miniature fasteners. Buy the combination for work you actually encounter.

The covered handles are a grip feature; do not treat them as a rated electrical-insulation system. For electrical work, use appropriate equipment and procedures for the actual task. The screw-extraction feature does not establish an electrical rating.

Know when a stubborn screw is beyond this tool

ENGINEER’s Japanese page warns against high-hardness fasteners such as tapping screws, drilling screws and coarse-thread screws. It also says a screw completely fixed by rust or adhesive may not be removable with the tool. Those restrictions matter more than the promise of quick removal.

The pliers depend on a sound enough head and a grip that can transmit turning force. More squeezing is not a guarantee of progress, and damage to the head or surrounding part can make the repair harder. If access or material falls outside the stated limits, choose a different repair approach instead of buying on hope.

Choose the PZ-59 when damaged, exposed heads are a repeat problem and its 3–12mm range and body size fit. Skip it for mostly tiny recessed screws, incompatible hardened fasteners or a completely seized joint. A convincing purchase starts with accessible geometry and an appropriate fastener, rather than the expectation that one plier will rescue everything.