Combined with quality drill bits.
HSS twist drill bits for metal, made of high speed steel, and wear well from professional treated.
Masonry drill bits for drilling in brick, cinder block and tile.
With removable storage and kept in plastic box.
10pc set, included: 

5pc Titanium Coated HSS Drill Bitss: 4-5-6-8-10mm; 
5pc masonry drill bits: 4-5-6-8-10mm.