Fanttik Screwdriver Replacement Bits: Fitment & Buying Guide

This guide covers replacement and expansion bits for Fanttik electric screwdrivers — which set fits which tool, the shank standard each chuck accepts, and where to buy genuine bits. Fanttik runs two bit standards: the precision 5/32" hex drive used by the E1 Max and its E-series siblings, and the larger 1/4" hex drive used by the cordless S1 Pro and S-series power screwdrivers. Matching the right shank is the most important step before ordering — a 1/4" bit will not seat in a 5/32" precision chuck, and vice versa. This is a sub-guide of the Fanttik replacement parts hub.

Two Bit Standards: Precision vs Power

Fanttik screwdrivers fall into two families, each using a different bit format. Identify your family before buying any bit.

The two are not interchangeable. The 5/32" precision bits are short and slim for the fine control a small electronics driver needs; the 1/4" hex bits are the industry-standard power-tool shank, longer and thicker to carry higher torque. If a bit does not click and hold in your chuck, you have the wrong standard.

Bit Sets by Model

E1 Max — Precision Bit Set

The E1 Max ships with 50 magnetic bits in a 5/32" hex format, stored in the tool's magnetic holder. It is one of the most complete precision sets in the lineup, covering the Phillips, flathead, Torx, and specialty profiles found inside phones, laptops, cameras, and watches. Bits are held magnetically, so swaps are tool-free. Because the E1 Max is a 3.7V precision driver, use only 5/32" precision bits — do not fit 1/4" power bits.

S1 Pro — Power Bit Set

The S1 Pro ships with 16 S2-steel bits, each 2" long with a 1/4" hex shank. S2 is a hardened tool-steel grade chosen for power-driving fasteners without rounding the tip. These bits seat in the S1 Pro's magnetic 1/4" chuck — the same standard used across the cordless S-series — and span the common Phillips, flathead, Torx, hex, and pozidriv profiles for furniture, cabinetry, and PC assembly.

E2 Series — Precision Bit Sets

The E2 Ultra and E2 Max are precision drivers in the same family as the E1 Max and use precision hex bits, not the 1/4" power shank. To confirm the exact bit count or replace a lost bit, check the bit list on your specific model's product page, since the precision sets differ slightly between models.

What Fits What

Match by family — precision drivers take 5/32" bits, power drivers take 1/4" bits.

For the power screwdrivers, any standard 1/4" hex bit will seat, but a hardened-steel bit like the S2 grade Fanttik ships lasts far longer under repeated driving. For the precision drivers, stick to genuine 5/32" bits — the fine profiles in modern electronics are hard to source accurately from generic kits.

When to Replace a Bit

• Rounded or cammed tip. If a bit slips in the screw recess and chews the head, the tip is worn — replace it before it damages more fasteners.
• Weak magnetic hold. A bit that keeps falling out may be corroded on the shank; clean it, and replace it if the hold does not return.
• Bent or burred shank. A bit that wobbles or no longer drops cleanly into the chuck has a damaged shank and should be retired.
• Lost bits. Precision sets carry many small profiles that are easy to lose; most users replace the full set to keep the tray complete.

Where to Buy Replacement and Expansion Bits

Order genuine bits through the Fanttik catalog so the shank standard and tip profiles match your tool. The fastest route is your screwdriver's product page, which lists the exact bit set and any separately sold accessories:

• E1 Max owners: start from the E1 Max product page to confirm the 50-bit 5/32" set.
• S1 Pro owners: start from the S1 Pro product page to confirm the 16-piece S2 1/4" set.
• Other models: browse the full Fanttik catalog or contact Fanttik support to confirm the correct bit standard before buying.

If a separately packaged replacement bit set is not listed for your model, contact Fanttik support before buying a third-party kit — they can confirm the exact shank size and recommend a compatible set.

FAQ

Q: Are E1 Max and S1 Pro bits interchangeable?
A: No. The E1 Max uses 5/32" hex precision bits and the S1 Pro uses 1/4" hex shank bits. The two standards do not fit each other's chucks. Always match the bit to your tool's shank size.

Q: How many bits come with the E1 Max?
A: The E1 Max ships with 50 magnetic bits in a 5/32" hex format, stored in the tool's magnetic holder.

Q: What are the S1 Pro bits made of?
A: The S1 Pro includes 16 S2-steel bits, each 2" long with a 1/4" hex shank. S2 is a hardened tool-steel grade suited to power-driving fasteners.

Q: Can I use any 1/4" hex bit in my S1 Pro?
A: Physically, any standard 1/4" hex bit will seat in the magnetic chuck. For durability, use hardened-steel bits like the S2 grade Fanttik ships — softer generic bits round off faster under repeated driving.

Q: Where do I buy replacement precision bits?
A: Order through the Fanttik catalog so the shank and tip profiles match. Start from your tool's product page, or contact Fanttik support if a separately sold set is not listed for your model.

Q: My bit keeps falling out of the chuck — is it worn?
A: First clean the shank, since corrosion weakens the magnetic hold. If the bit still will not stay seated, the bit or chuck magnet may be damaged; replace the bit and check the chuck.

Related Support

• Fanttik Replacement Parts Hub — genuine parts mapped to every product line.
• Fanttik S1 Pro Manual & Quick Start — charging, torque modes, and bit changing.
• Fanttik E1 Max Troubleshooting Guide — power, torque, and bit-seating issues.
• Fanttik S1 Pro Troubleshooting Guide — motor, torque mode, and chuck problems.
• Fanttik Support Center — confirm bit fitment and order genuine sets.