Help identifying tools!!

[Grandfather's Tools]

Hey guys,

Wondering if anyone can help me with a name and purpose of these particular chisels. They are chisels, right? Hope I at least got that right. I have many normal chisels of all shapes and sizes to find new homes for, but just can't even begin to guess what these are for. It's obvious the black rubber handles work with them to allow for a larger hammering surface, but what are they hammered into? What job or hobby needs these?

Many thanks, as always.

 

[454ragtop]

Look like star drills for making holes in concrete,

 

[lbgradwell]

Winner!

 

[Grandfather's Tools]

Drills? So you don't pound on these with a hammer? They fit perfectly into those black rubber grips.

Never mind, Wiki says "A star drill bit, similar in appearance and function to a hole punch or chisel, is used as a hand powered drill in conjunction with a hammer to drill into stone and masonry. A star drill bit's cutting edge consists of several blades joined at the center to form a star pattern."

Thanks very much! I can't look things up if I don't know what to call them. I'd have never guessed Star bit. Thanks again!