The 13mm keyless chuck combi drill can support large drill bit sizes up to 13mm. This means that these drills can be used to tackle the jobs which require large holes to be drilled. Typically, the 13mm keyless chuck combi drills are a little larger in size and weight when compared to their smaller, 10mm variants. 

Combi drills combine a hammer action feature, which allows these drills to tackle masonry, brick and concrete, along with other materials, such as wood, plastic and metal. A keyless chuck system means that the drill bit can be put in the drill and tightened by hand, instead of needing an additional key to tighten the chuck mechanism.