a drawing pin have seven eyes. there are 4 located on the cilidrical top and 3 located beneath that.
Used to hold drawings flat.... Because they used to be used in draughting offices to hold plans flat on drawing boards - the wooden boards were resistant to normal pins and the broad top of the...
5.0 grams
1,000 grams in a kilogram
Mega = 10^6, i,e, one million grams in a megagram