• Manufactured from heat treated Chrome Molybdenum steel.• Designed to remove broken studs and bolts.• Reverse spiral design for maximum grip.• Recommended drill bit size (for pilot hole) etched on each extractor, suitable for high torque applications.• Hex shaped head.• Contents: 1/8"(3.2mm), 5/32"(4mm), 3/16"(4.8mm), 7/32"(5.5mm), 1/4"(6.3mm), 9/32"(7mm), 5/16"(8mm), 11/32"(8.7mm), 3/8"(9.5mm), 13/32"(10.3mm).• Supplied in storage case.Manufactured from heat treated Chrome Molybdenum steel, designed to remove broken studs and bolts. Reverse spiral design for maximum grip and hex shaped head. Recommended drill bit size (for pilot hole) etched on each extractor, suitable for high torque applications. Supplied in storage case.• Hex head multi-spline extractor. • Heat treated Chrome Molybdenum steel. • Designed to remove broken studs and bolts. • Reverse spiral design for maximum grip. • Suitable for high torque applications. • Contents: 1/8"(3.2mm), 5/32"(4mm), 3/16"(4.8mm), 7/32"(5.5mm), 1/4"(6.3mm), 9/32"(7mm), 5/16"(8mm), 11/32"(8.7mm), 3/8"(9.5mm), 13/32"(10.3mm). • Supplied in storage case. • Model No. AK8181Technical Specification:Contents: 1/8"(3.2mm), 5/32"(4mm), 3/16"(4.8mm), 7/32"(5.5mm), 1/4"(6.3mm), 9/32"(7mm), 5/16"(8mm), 11/32"(8.7mm), 3/8"(9.5mm), 13/32"(10.3mm)Nett Weight: 0.55kgDimensions: Length: 40mm x Height: 120mmWeight: 0.58KgWarranty: Consumable