Lexicon DIY-Knowledge





The various types of chisels are designed for special applications depending on their shape and design.

Bull point

Pointed chisels are mainly recommended for hard materials like concrete. All the hammer energy is concentrated on the tip and the wedge effect which follows ensures the best possible removal rate.

Flat chisel

The flat chisel is preferred for softer types of masonry such as brick, sand-lime brick and such like. The cutting egde ensures the efficient transfer of percussion energy to the material. It is also used for marking, i.e. tracing the masonry to be chiselled off.

Spade chisel

A broad flat chisel for breaking-up and softening of earth, cast plaster, bitumen, or to knock off the plaster from walls. The broad cutting egde of 50 to 110 mm in width ensures the favourable chiseling and caulking performance with light materials such as pumice breeze blocks, vertically perforated brick and plaster. When knocking off tiles a suitable chisel width can be selected depending on the hardness of the mortar.

Channel chisel, gouge

These tools can be used to cut channels and slots for gas, water and electrical installations in the most diverse materials (not granite and marble). Extended wings on the winged channel chisel make it the preferred tool for softer materials. The slight bend of the gouge facilitates the maintenance of a constant cutting depth.

Seam tool

Used for the removal of excess mortar between masonry joints.

Slotting tool

Slotting tools are similar in application to flat chisels. Their advantage lies in the broad cutting edge which has the same effect as a pointed chisel. The tips penetrate like individual teeth into the material and yield a high removal rate. When you cut long grooves or knock off tiles, flagstones or stone slabs with subsequent cleaning and roughing of the surfaces, this type of tool is an advantage.

Pointed spade

Used for breaking up hard-packed earth and clay.

Tamper plate

Used for tamping and compressing on small surface areas (sand, gravel, compacted concrete or heavy soil). The tamper plate is mounted on a tool holder with tapered shank. The smallest tamper plate yields the highest compression rate.

Bushing head

Used for the roughing or smoothing of surfaces on concrete, artificial or natural stone. The surface structure or texture depends on the number of teeth and the duration of use or the percussion force per stroke of the bushing head. The bushing head is mounted on a tool holder

with tapered shank. Since the stone surface is easily removed, bushing heads can also be used to take off coats of paint containing caoutchouk if the underground is solid.

Splitting wedge

This tool is used to split massive rocks after preparatory bore holes have been drilled into the rock with a rotary hammer.

Tile chisel

For the easy removal of tiles (with ergonomically angled working end).

Joint chisel

To remove the mortar between bricks, to take out individual bricks intact, to remove tiles and plaster layers (with hardmetal teeth).

Firmer chisel

For general carpentry work, fast chipping in soft wood, e.g. to remove old window frames.