400pcs combination drill set Item No. SM8100400 - 400pcs combination drill set -21pc titanium coated HSS drill bits: 1.0, 1.5, ... 9.5, 10.0mm- 21pc HSS twist drills set: 1.0, 1.5, 2.0, 2.5 ... , 5.5, 6.0, 6.5mm- 5pc SDS-plus drill bits: 5.0x110, 6.0x10, 8.0x110, 10 ... holder- 5pc aluminum dxide grinding wheel- 23pc masonry drill bits: 3.0x2, 3.5x2, 4.0x2, ... Item No. SMD8100400 -400pc combination drill set