Sealey-AK8181-Multi-Spline-Screw-Extractor-Set-10pc-Sealey-AK8181-Manufactured-from-heat-treated-Chrome-Molybdenum-steel-designed-to-remove-broken-studs-&-bolts-Reverse-spiral-design-for-maximum-grip-&-hex-shaped-head-Recommended-drill-bit-size-for-pilot-hole-etched-on-each-extractor-suitable-for-high-torque-applications-Supplied-in-storage-case-Sealey-AK8181-Multi-Spline-Screw-Extractor-Set-10pc