Screws
These are three different types of screw.
Countersunk: First you drill a pilot hole into the wood. Then you can widen out the top by using a countersink drill bit. The head is flat on the top.
![WHIT CSK Socket Set Screw](https://cdn.arunfasteners.co.uk/wp-content/uploads/2018/01/WHIT-CSK-Socket-Set-Screw-copy-300x192.jpg)
Raised head: Has a slightly domed head, raised above the surface.
![Metric CSK Raised Slotted Machine Screw](https://cdn.arunfasteners.co.uk/wp-content/uploads/2017/05/Metric-CSK-Raised-Slotted-Machine-Screw-copy-300x194.jpg)
Round head: Domed head above the surface, broader than underneath
![Woodscrew Round Slotted](https://cdn.arunfasteners.co.uk/wp-content/uploads/2018/01/Woodscrew-Round-Slotted-copy-300x210.jpg)