i used a glass a hammer and a nail

tap,tap ...tap,tap,

dont hit hard, and when u do start to get a lil divet (hole starting) stop..BE EXTREMLY CAREFUL! one wrong move and the hole things wrecked, use a knife with a sharp strong tip...use it like a screw driver and dig into the divet, a hole will soon be dug...be very slow....REMEMBER DON'T USE A LOT OF PRESSURE..takes a long time to perfect...you probly will fuck up on the first one