20Pcs 25mm Philips Screwdriver Bits Set (PH2x25)

Twenty-five millimetres is the standard insert bit length — the short bit that goes into a magnetic holder, a bit holder or straight into a drill or impact driver chuck. It is the workhorse length and PH2 is the workhorse size, which is why these are bought twenty at a time rather than singly.

The two specifications that matter are the steel and the hardness, and they are worth understanding because they explain why bits vary so much in price and life. S2 is a shock-resisting tool steel: it can be hardened hard while still absorbing repeated impact rather than shattering, which is exactly what a bit in a power driver needs. HRC 58-62 is considerably harder than a hand screwdriver blade, which typically sits nearer 50, and that difference is deliberate. A hand driver turns slowly and its user feels what is happening; a power driver spins fast, cams out repeatedly, and hammers. Without that hardness, bit flutes round off within a day.

Which matters because of what a worn bit does. It does not simply stop working — it starts destroying screws. A rounded PH2 bit cams out of every recess it meets and rounds the screw head as it goes, and because the wear is gradual people keep using it. Buying bits by the box is what makes it easy to throw a worn one away.

The satin finish resists corrosion without adding thickness to the tip form.

The buyers are carpenters and joiners, shopfitters and installers, drylining and construction contractors, furniture and cabinet fitters, electricians, maintenance staff, and hardware dealers, who sell PH2 bits faster than anything else in the category.

Two habits. Push the driver hard into the screw — the Phillips recess is designed to cam out, and pressure is what keeps the bit engaged and stops it wearing. And change the bit as soon as it starts slipping, rather than when it stops working entirely. Ask us on WhatsApp for a price, singly or by the box.