Question

what is the definition of
1/ portable drill
2/ pillar drill
3/countersink
4/pilot hole

thanks for your help

Answer 1

http://dictionary.reference.com/browse/drill

http://www.design-technology.info/equipment/pillardrill/default.htm

http://www.technologystudent.com/equip1/macdrl1.htm

http://en.wikipedia.org/wiki/Countersink

http://en.wikipedia.org/wiki/Pilot_hole

Answer 2

thankyou for helping finding the sites about the different drills it was big help

Answer 3

You're welcome.