Designed to remove broken bolts and studs without damaging the casing. Manufactured from heat treated Chrome Molybdenum steel. Reverse thread spiral design for maximum grip, with recommended drill bit size (for pilot hole) etched on each extractor. Suitable for use with 3/8''Sq drive ratchets. Supplied in storage case. Features & Benefits: • Designed to remove broken bolts and studs. • Heat treated Chrome Molybdenum steel. • Reverse thread spiral design for maximum grip. • Suitable for use with 3/8''Sq drive ratchets. • Contents: 2, 3, 4, 6, 8, 10mm. • Supplied in storage case. • Model No. AK8185 Specifications: Model No AK8185 Brand: Sealey Contents: 2, 3, 4, 6, 8, 10mm Nett Weight: 0.59kg