Topec 49pcs Screw Extractor/Drill Bit Set, professional remove set for removing broken studs, bolts, socket screws and fittings. 49-PIECE MULTIFUNCTIONAL SET- 13+1pcs nut remover set and 3/8″-1/4″ hex adapter, 6pcs spiral screw extractors, 13pcs multi-spline screw extractors, and 16pcs left hand cobalt drill bits. VARIOUS SPECIFICATIONS AND SIZES- The set contains four types of 49 models of parts including metric and imperial sizes such as: 13mm, 9/16″, 5/8″, 17mm, 11/16″, 3/4″. You can choose the suitable size according to the size of your fasteners to meet various job requirements. HIGH CARBON STEEL AND HSS MATERIAL-The set is made of High carbon steel and HSS materials. The spiral pattern design can provide sufficient gripping force to facilitate removal. High-quality materials can be used for fasteners of various metals. Please note: Cobalt drill bits should not be used for stainless steel. WIDE RANGE OF APPLICATIONS- Spiral flute extractors are perfect for common fasteners. The mult-spline extractors are useful for higher torque and lower profile tools, while the bolt extractors are for freeing partly-exposed fasteners. The kit also includes a left cobalt drill bit for fasteners, which can be used to help drill these fasteners. SERVICE – If you have any problems during using our product. Topec Direct after-sale Team will get in touch with you and timely solve your problems. Includes spiral flute extractors, multi-spline extractors, bolt extractors, and left-hand cobalt drill bits for extracting all kinds of fasteners Easy out spiral flute extractors for use on common fasteners and lower torque Multi-spline extractors for higher torque or lower profile tools. Please wait for the result of cancellation. The order will be processed and completed by automatic warehouse system within 5 minutes. Sending direct message to cancel the order is not allowed for every case. For the return case.