400pcs combination drill set Item No. SM8100400 - 400pcs combination drill set -21pc titanium ... 1pc 150mm atainless steel puler- 4pc sanding drums: 13, 19, 25, 25mm- 1pc quick changer- 38pc wood-boring drill ... 3x30mmx20, 4x40mmx12, 5x50mmx8- 12pc flat wood bits: 13, 16, 19, 22, 25, 32mm, 1/2", 5/8", 3/4 ... 150mm flexible driver shaft- 1pc extension holder Item No. SMD8100400 -400pc combination drill set