300 pcs combination drill set can meet different needs 300 pcs combination drill setSpecifications:7 pieces HSS twist drill: 2.0, 3.0, 4.0 ... , 5.0, 6.0, 8.0, 10.0mm5 pieces wood working drill: 4.0, 5.0, 6.0, 8.0 and 10 ... .0mm5 pieces masonry drill: 4.0, 5.0, 6.0, 8.0 and 10 ... x 22.5cmNet weight: 17kgGross weight: 19kg 300 pcs Combination Drill set