What sizes does this cover?

The Socket & Wrench Size pack covers standard metric hex bolts from M3 to M36 and imperial hex bolts from 1/4" to 1-1/2". These are the most common sizes in hardware stores and automotive work.

Are these sizes guaranteed correct?

Sizes are based on ISO and SAE standards for standard hex head bolts and nuts. Actual fasteners vary by manufacturer, grade, and application. Always verify with the fastener when precision matters.

What about Torx, spline, or specialty fasteners?

This tool covers hex head fasteners only. Torx, spline, 12-point, and other drive types are not yet supported.

Can I use the nearest imperial socket on a metric bolt?

In a pinch it may work, but risks rounding the fastener head. Use the correct socket whenever possible. Related values shown are for reference, not substitution.

Will more packs be added?

Yes. Pilot Hole, Tap Drill, and Metric/Imperial conversion packs are planned. The architecture supports new reference sets without changing the app.

T4 Torx Bit — 1.28mm

A T4 Torx (star) bit measures 1.28mm point-to-point.

Result

Answer

T4 Torx bit

Common

BuyT4 bit Budget set Pro set

Torx SizeT4

Point-to-Point1.28mm

Common FastenersSpecialty use

Security VariantNot available

Bit Shank1/4" hex

A T4 Torx bit measures 1.28mm point-to-point. Micro precision; hard-drive screws and small gadgets.

Note

T4 is a specialty size with limited retail availability. You may need to order from a specialty tool supplier.

Related Sizes

← T3 (1.17mm)T5 (1.42mm) →

About T4 Torx Bits

A T4 Torx (star) bit measures 1.28mm point-to-point and fits a standard 1/4" hex shank driver. This is a specialty size not commonly found in consumer applications. Micro precision; hard-drive screws and small gadgets. No standard security variant exists for T4. T4 is a specialty size — you may need to order from a specialty tool supplier.

← Look up another Torx size