Sealey 25pc Screw Extractor Set 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), 7/16"(11.5mm), 15/32"(12mm), 1/2"(13mm), 17/32"(14mm), 9/16"(14.5mm), 19/32"(15.5mm), 5/8"(16mm), 21/32"(17mm), 11/16"(18mm), 23/32"(18.5mm), 3/4"(19.5mm), 25/32"(20mm), 13/16"(21mm), 27/32"(22mm), 7/8"(23mm). DELIVERY Available for home delivery or FREE click and collect from any of our five branches .