Pay Attention To

  TORQUE

– If you are fixing a dense material, you may need screws that take High Torque.

– The higher is the torque of the screw, the higher force can be transmitted to fixing.

– The higher is the torque of the screws, the harder it is to strip the fixings heads.

– Torx, Robertson and Hex Drives take more torque compared to Phillips, Pozi and Frearson Drives.

  DESIGN

– Slot drive looks more nostalgic, but is not suitable for installation with power tools and it is easy to strip the heads.

  INSTALLATION CONVENIENCE

– Some drive types are offering firm drive and retain the screw, even if it is shaken. These types are for example Torx, Robertson and Hex.

– Screwdriver tends to cam-out* at high torque from Phillips and Pozidriv Drives.

– Slot drive is very inconvenient to install since the driver tends to slip out of the head.

Common Drive Types

Slot Drive

Head drive type, Slot Drive

LOW TORQUE

Historically has been used the longest time

 Simple design and cheap to produce

Not suitable for installation with power tools. Power driver tends to slip out of the head

Phillips Drive

Head drive type, Phillips Drive

MEDIUM TORQUE

Recess is rounded and tapered

Phillips screwdriver has slightly tapered flanks, a pointed tip, and rounded corners

The design is preventing over tightening the fasteners. For example, this is useful when installing plasterboards

Tool can cam-out* at high torque

Easy to strip the heads

Pozidriv

Head drive type, Pozidriv Drive

MEDIUM TORQUE

 Pozidriv screwdriver has parallel flanks, a blunt tip, and additional smaller ribs at 45° to the main slots

 Offers additional stability and better resistance to slipping than Phillips drive

Tool can cam-out* at high torque

Frearson Drive

Head drive type, Frearson Drive

MEDIUM TORQUE

Recess is a perfectly sharp cross, allowing for higher applied torque

Higher applied torque than Phillips and Pozi drive

One driver or bit fits all screw sizes

Torx Drive

Head drive type, Torx Drive

HIGH TORQUE

Good resistance against cam-out*

Firm drive

Extended bit life

Screw can be removed if painted over or old and rusty

Robertson Drive

Head drive type, Robertson Drive

HIGH TORQUE

Socket has a slight taper what makes inserting the tool easier and helps to keep the screw on the tool tip without the user needing to hold it there

Popular in woodworking and in general construction

Tapered socket tends to retain the screw, even if it is shaken

Good resistance against cam-out*

Firm drive

Screw can be removed if painted over or old and rusty

Hex Drive

Head drive type, Hex Drive

HIGH TORQUE

Drive uses six-sided fastener heads

Can be turned with an adjustable wrench, combination wrench and 6- or 12-point sockets

Can be removed if painted over or old and rusty

Firm drive

Hex-Socket Drive

Head drive type, Hex-Socket Drive

HIGH TORQUE

Good resistance against cam-out*

Can be removed if painted over or old and rusty

Firm drive

Double-Square Drive

Head drive type, Double-Square Drive

HIGH TORQUE

2 Robertson squares superimposed at 45° rotation

Screw can be engaged at more frequent angles by the driver bit compared to Robertson Drive

Good resistance against cam-out*

Screw can be removed if painted over or old and rusty

Firm drive

* Cam-out – a process by which a screwdriver Slip out of the head of a screw being driven once the torque required to turn the screw exceeds a certain amount. (from Wikipedia)

There are many more different drive types that are not so commonly used. If you could not find your drive info here, you can look up more, for example, in Wikipedia.

 

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