Slate guillotines usually have a steel frame and blade, with the punch pin also being made from steel. The handle of a slate guillotine can be PVC covered for the user’s comfort, and to provide a good grip.
Some slate guillotines have a frame made of high-quality aluminium alloy, weighing 7kg.
A bowling ball can weigh roughly 7kg, the same as a slate guillotine.
Steel
Steel is an alloy created by adding carbon to iron. The exact type of steel used in a slate guillotine depends on many factors, including toughness, corrosion resistance, temperature resistance, flexibility and so on.
Aluminium
Aluminium is soft but durable, lightweight, adaptable and abundant.
It’s also resistant to corrosion.
PVC
PVC is used to cover the handle on a slate guillotine because it provides a good grip and is comfortable.
Summary
An aluminium guillotine will be lighter to carry and use than a steel guillotine.
Both aluminium and steel are corrosion resistant.
Steel is tough but flexible, aluminium is soft but durable.
The blade and punch pin on all guillotines are made of steel and will cut and punch slate equally as required.