The forcing screw is designed to create strong pushing force so the object being removed comes loose. Fastening screws are made of heat-treated steel. The set includes: 3 Screw 3/8” – 16NC x 4”; 3 Screw 3/8” – 24NF x 2”; 3 Screw 55/16” – 18NC x 2”; 3 Screw M8 – 1,25mm x 80mm”; 3 Screw M10 – 1,50 x 50mm”; 3 Screw 1/4” – 28NF x 3”; 3 Screw 5/16” – 24NF x 3 1/2”; 3 Screw 5/16” – 18NC x 4 1/2”; 1 Central Screw 5/8” – 18NF x 5” (with bit); 1 Central Screw 5/8” – 18NF x 6 1/2” (with bit); 1 Extractor.