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Front view of Tekton case bit set. Item #DBA93100
Laid out contents of Tekton case bit set. Item #DBA93100
TEKTON 4 mm Precision Bit Driver and Bit Set with Case (97-Piece)
Front-right angle view of Tekton case bit set. Item #DBA93100
Laid out contents of Tekton case bit set. Item #DBA93100
Side view of Tekton case bit set. Item #DBA93100
Person holding Tekton case bit set. Item #DBA93100
Click image to zoom in
Item #DBA93100

4 mm Precision Bit Driver and Bit Set with Case (97-Piece)

 • 
$50.00
Set Includes:
DetailsSpecs

Details

4 mm bit and bit driver removing a screw on the bottom of a laptop computer.

Designed for Small Components and Electronic Devices

This mobile kit helps you work on an enormous range of small screws, including those found on:
  • laptops and other computers
  • controllers and consoles
  • cell phones and various smart devices
  • electronic components on vehicles and equipment
  • small appliances
  • cameras
  • access control hardware
  • radio-controlled vehicles
  • personal items like eyeglasses and watches
The tip of a tamper star 4 mm bit in a bit driver.

Precise Tip Geometry and Stamped Markings

Tekton 4 mm bits are made with tight tolerances for a secure fit in small screws, reducing slip and wear—crucial for high-value, sensitive electronics.
Close-up image showing the stamped markings on the bit.
The tip size and Tekton "T" are clearly stamped onto every bit.
Comparison between Tekton bit and Wiha bit after 48 hours in a saltwater solution. The Wiha bit has more corrosion.

Hardened Bits with Non-Flaking Protective Finish

The bits are made from hardened 8660 steel (55–58 HRC)* and finished with a zinc phosphate conversion coating that provides lasting corrosion resistance without altering dimensions or flaking, unlike chrome finishes.
* Line Head bits are made of hardened AISI 1015 steel (40 HRC)
Hand holding a Tekton rail of 4 mm bits with Tekton 4 mm bit set #DBA93100 in the background.

Modular Bit Organization

Bits are grouped in logical 12-piece sets across 8 modular rails. The rails can be removed or rearranged within the case.

Bit Rails Have a Soft, Secure Hold

The flexible rails securely grip the bits so they can’t fall out, while also making it easy to remove any bit one-handed. The rails can also stand upright on a flat surface, making the markings easier to see.
Close-up view of the markings on a Tekton 4 mm bit rail.
High-contrast size markings are printed on the top of the rail.
The Tekton 4 mm bit driver has a spinning end cap and magnetic bit receiver. Bits are magnetized when inserted into the driver.

Smooth-Spinning Magnetic Driver

Keep the bit engaged by pressing on the end cap while spinning the driver body. A recessed magnet holds and magnetizes the bit.
A 28 mm bit will have 16.4 mm of exposed bit in the driver.
The Tekton 4 mm bit driver has a finger knob, C-clip, bearing, knurling on the body, and a recessed magnet in the tip.

Aluminum Bit Driver

The driver body and endcap are machined from aluminum and finished with a black anodized coating.

Soft-Shell Zippered Carrying Case

The case is firm but flexible and won't break when dropped.
The lid of the case with small screws and other parts in it.

Top Lid Parts Tray

A hand removing one bit from a rail in the case.

Room for Your Fingers

Image showing 3 out of the 7 open slots being used by other bits.

Open Slots for Most Used Bits

Image showing the foam inside the case with nothing in it.

Contoured Inset EVA Foam

The exterior fabric is made of 600D polyester, the molded shell is made of EVA foam, and the interior fabric is made of jersey cloth.

3-Layered Case Material

A hand opening the zipper on a closed case.

Zippered Closure

Bit Sizes Included

This is one of the most comprehensive 4 mm bit sets available, with 96 unique bits spanning 18 types—no duplicate bits or filler pieces.
Tekton bit rail
Phillips

Phillips: P000, P00, P0, P1, P2(5 sizes) JIS and JCIS Compatible

Slotted

Slotted: 0.8, 1, 1.5, 2, 2.5, 3, 4 mm(7 sizes)

Tekton bit rail
Y-type

Y-Type: Y000, Y00, Y0, Y1, Y2(5 sizes)

Pentalope

Pentalobe: PL1, PL2, PL3, PL4, PL5, PL6(6 sizes)

Standoff

Standoff(1 size)

Tekton bit rail
TR-Hex

Tamper Hex (IN): 5/64, 3/32, 7/64, 1/8, 9/64, 5/32 in.(6 sizes)

TR-Hex

Tamper Hex (MM): 2, 2.5, 3, 3.5, 4 mm(5 sizes)

SIM Ejector

Sim Ejector: 0.8 mm(1 size)

Tekton bit rail
Hex

Hex (MM): 0.7, 0.9, 1.3, 1.5, 2, 2.5, 3, 3.5, 4 mm(9 sizes)

Pozi

Pozidriv: PZ0, PZ1, PZ2(3 sizes)

Tekton bit rail set
Hex

Hex (IN): 0.028 , 0.035, 0.050, 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32 in.(10 sizes)

Triple Square

Triple Square: M3, M4(2 sizes)

Tekton bit rail set
Tamper Star

Tamper Star: TR6, TR7, TR8, TR9, TR10, TR15, TR20(7 sizes)

Triangle

Triangle: TA14, TA18, TA20, TA23, TA27(5 sizes)

Tekton bit rail set.
Star

Star: T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T15, T20(12 sizes)

Tekton bit rail set.
Square

Square: S00, S0, S1, S2(4 sizes)

Spanner

Spanner: 2.0, 2.6 mm(2 sizes)

Clutch

Clutch: 3/32, 1/8 in.(2 sizes)

Tri-Wing

Tri-Wing: TW0, TW1

(2 sizes)
Line Head

Line Head: LH-2, LH-3(2 sizes)

Specs

4 mm Precision Bit Driver and Bit Set with Case (97-Piece)

Specs for 4 mm Precision Bit Driver and Bit Set with Case (97-Piece)
Country of Origin
Taiwan
Item Weight
0.93 lb.