Pointed Chisel (The Breaker)
Shape: A sharp, conical point.
Function: Maximum Penetration.
The Pointed Chisel (or Bull Point) concentrates 100% of the hammer's energy into a single dot. This creates maximum stress in the concrete, causing cracks to radiate outwards.
Best For:
- General demolition of concrete slabs.
- Starting holes in masonry.
- Breaking up hard brick.
Flat Chisel (The Controller)
Shape: A flat cutting edge (usually 20mm - 25mm wide).
Function: Directional Control.
Unlike the point, the Flat Chisel directs the breaking force in a specific line. This allows you to control where the concrete breaks.
Best For:
- Edging and defining boundaries before breaking.
- Channeling (cutting grooves for pipes/wires).
- Removing excess concrete splatter.
Spade/Scaling Chisel (The Remover)
Shape: A very wide, flat blade (40mm - 75mm+).
Function: Lifting and Scraping.
The wide blade isn't for breaking *into* the concrete, but for sliding *along* it. It spreads the force to lift material off the surface.
Best For:
- Removing old tiles and thinset mortar.
- Scraping off rust or welding spatter.
- Cleaning concrete forms.
Can You Sharpen Chisels?
Yes. Unlike drill bits which require complex geometry, chisels are simple.
However, DO NOT overheat the tip while grinding. If the tip turns blue, you have ruined the heat treatment (temper), and the steel will become soft and useless. Grind in short bursts and dip in water frequently.
