Features: This is a set of power tools including 13 drilling bits and 4 chisels in different sizes and shapes. Drilling bits and chisels are made of high quality 40CR steel for high hardness, durability and long service life. All are well packed and assorted in a plastic box for convenient carry and storage. They are great tools used with electric rotary hammers used for concrete drilling or grooving. If you works in building, construction site or interior finish, this is a very useful tool set for you to have. Specifications: Material: 40CR steel Shank Diameter: 10mm Size: Hammer Drill Bit: 5.5mm, 6mm x110mm, 5.5mm, 6mm, 6.5mm, 7mm, 8mm x 160mm, 10mm x 160mm (2pcs) 14mm x 210mm 10mm, 12mm, 16mm x 260mm Point Chisel: 14mm x 250mm Flat Chisel: 14mm x 250mm x 20mm 14mm x 250mm x 40mm Groove Chisel: 14mm x 250mm Package Includes: 13 x Drill Bits 4 x Chisels Note: The plastic box might be slightly broken during transportation. 1This is a set of power tools including 13 drilling bits and 4 chisels in different sizes and shapes 2Drilling bits and chisels are made of high quality 40CR steel for high hardness, durability and long service life 3All are well packed and assorted in a plastic box for convenient carry and storage 4They are great tools used with electric rotary hammers used for concrete drilling or grooving 5If you works in building, construction site or interior finish, this is a very useful tool set for you to have