Pilot hole sizes needed are 4, 5, 6, 7 ; 8mm. RS PRO 5 Piece Splined Screw Extractor Set. From RS PRO, this robust screw extractor set is ideal for removing broken screws and threaded bolts without damaging the thread. With a hardened chrome vanadium steel construction, the splined screw extractors are suitable for turning and retrieving many types of studs and bolts of medium tensile strength. With a hardened alloy steel construction, this kit promises a long and dependable work life. A tap wrench is supplied by RS PRO ; 444-891 444-891. Features and Benefits Hardened steel construction Suitable for various sizes of screw or bolt Suitable for use with appropriately sized tap wrenches Supplied in a plastic case Works on both left and right-hand threads Cuts straight into bolts after drilling pilot hole, eliminating wedging or added tightening Contents: 1/4, 5/16, 3/8, 7/16 and 1/2 in sizes Applications The screw extractors can be used with a tap wrench to be securely forced into pre-drilled problem screws, and then easily turned. Where cheap or old screws have been used, it is not uncommon for the heads to become worn or broken, making them unsuitable for removal by conventional screwdrivers. By drilling into the screw or bolt head, and inserting these screw extractors with careful force, the screw can be extracted in the usual way without having to wrench or dig. This high-quality screw extractor set is ideal for those repairing or restoring machinery or furniture. Tool Care Though somewhat resistant to corrosion, it is a good idea to store your screw extractors in a dry place to further their work life. As such, it is recommended to store the tools in their supplied case when not in use. Why RS PRO? RS PRO aims to be your go-to brand for reliability and value for money. We source great parts at great prices and test everything with our in-house experts to ensure the quality you need. When it comes to tools, we know that versatility and dependability are what you need. As such, we stock a variety of mainstay and specialist tools to suit any application. Whether you're a professional electrician, plumber, builder or DIY enthusiast, RS PRO is here to support you. Features ; Benefits Heat treated high strength tool steel Works on both left and right-hand threads Cuts straight into bolts after drilling pilot hole, eliminating wedging or added tightening Contents: 1/4, 5/16, 3/8, 7/16 and 1/2 in sizes More information:  | | Number of Pieces: | 5 | Set Contents: | 1/4 in, 5/16 in, 3/8 in, 7/16 in, 1/2 in in | Material: | Steel |
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