COMBINED HAMMER DRILL BIT SET 1,HOUSEHOLD TOOLS. 2,11PCS DRILL BITS 3,GOOD QUALITY 4,BEST PRICE 11PCS HAMMER BITS SET1, Made by 40cr and 50# carton steel2, Sturdy and durableSpecifications:6, 8,10,12*210MM;14,16,18*260MM;12*14*16*20*450MMPacking: plastic caseMeasurements: 51.5 x 42.5 x 22.5cmNet weight: 17kgGross weight: 19kg 11PCS HAMMER DRILL BIT SET