Features This nut bolt extractor socket set is made of superior 40CR material, high hardness and durable in use The specially hardened sockets with corrosion protection are designed for the removal of damaged bolts, and nuts Spiral cut teeth provide positive grip, remove circular or damaged bolts The innovative spiral profile digs itself into the head of a damaged screw or nut, allowing it to be easily loosened It also includes a bar to help extract the damaged fastener from the socket Descriptions:This nut bolt extractor socket set is made of superior 40CR material, specially hardened sockets with corrosion protection are designed for the removal of damaged bolts, and nuts. It also includes a bar to help extract the damaged fastener from the socket. With this tool set, you will have smooth experience in your repairing process. Specifications:Material: 40 CR(extractor socket), #45 steel(bar)Model: # 1 - # 10 Explosion-proof: yes Insulation: yes Magnetic: no Size range: 9-19mmBar length:10cm/3.94inch Bar diameter: 6mm/0.24inchWeight: 369g Remover NO.  Fits hex size Outside hex size  #1 9mm 16mm  #2 10mm 16mm  #3 11mm 17mm  #4 12mm 19mm  #5 13mm 19mm  #6 14mm 21mm  #7 15mm 22mm  #8 16mm 24mm  #9 17mm 24mm  #10 19mm 27mm Package Included:10 x nut bolt extractor socket1 x bar1 x case Package List