This uses a 696 bearing, order 2 spin pads to complete your spin dice.
http://shpws.me/N2bt
One side is 1-5 the other is 1-20
How the 1-100 random number generator works. The way it will work is you spin the 5 sided side first to get a number. This is the multiplier number, then spin the 20 side to get the your number. If the number is between 1-9 add the multiplier to the front, if it is 10-20 multiply the number by the multiplier. Example, multiplier is 4, number is 9 so random 1-100 number is 49. If the multiplier is 3 and the number is 20 the random 1-100 number is 60.