Here you can save by buying bulk.
All are made of resin which gives you the best quality.
25g = 19 pkts or 3,800 drills
50g = 38 pkts or 7,600 drills
100g = 76 pkts or 15,200 drills
250g = 192 pkts or 38,400 drills
500g = 384 pkts or 76,800 drills
1kg = 768 pkts or 153,600 drills
Some colours may be a little different to online picture, as it maybe a different batch.