Might be a thread for the Garage Journal,but gotta ask here...... So I make holes in numerous things....(keep it clean 'cause I need an answer). Basically a fixed point at one end(spike,screw,what have you,) and a sliding other "point" to make a circumference.... circle. Would like something say from 2'' to 6'' or larger. Basically i've been to hardware stores,and have to describe the ol'e movie deal where the bad or good guy makes a hole in a window in a perfect circle....Get it? Hope not to sound dumber than I am,but that's the way I can describe it. I keep making my own which works out fine everytime,but i'de like to get a "real" tool that would have a slide in it for numerous dimmentions. I know there out there,and a lot of HAMBER'S use them,just want the correct name,and possibly where to get one. Thanks,and go easy on the uninformed!