ISO 2380-1 specifies the internationally standardized shape and dimensions of the tips of screwdrivers for slotted-head screws as well as the minimum test torque the blade-to-handle connection shall withstand. Note that it is this typical chisel shape which allows 9 screwdriver sizes to drive 24 different slotted screw sizes, with the drawbacks of not fitting as closely as a hollow-ground screwdriver would, and increasing the possibility of damaging the fastener or surrounding area. Flat-blade jeweler's screwdrivers and the tips found in 1⁄ 4-inch or 6.4-millimeter drive sets are generally hollow-ground. A hollow-ground screwdriver is less likely to cam out (leave the slot due to the torque being translated into an axial force, similar to that encountered with Phillips drive but dependent only on driver blade), so more torque can be applied without damaging the screw head. The tool used to drive a slot is called a common blade, flat-blade, slot-head, flat-tip or flat-head / flathead screwdriver. For this reason, cruciform-slotted along with drives have replaced the slot drive in numerous applications. However, this design is not well-suited for installation by power tools, given that a power driver often slips out of the slot this often causes damage to the screw and surrounding material. Slot screws are also used in the restoration of antique furniture, vehicles, and equipment. The slotted screw is commonly found in existing products and installations, along with use in simple carpentry work and in applications where minimal torque is needed. Additionally, it is unique because the slot head is straightforward to manufacture, and because it can be driven by a simple handtool. This form was the first type of screw drive to be developed, and for centuries, it was the simplest and cheapest to make because it can just be sawed or filed. Slot screw drives have a single horizontal indentation (the slot) in the fastener head and is driven by a "common blade" or flat-bladed screwdriver. Standard slot screwdriver sizes (ISO 2380). eBay is not affiliated with or endorsed by Apple.Slotted drives Slot drive tool and screw sizes Blade width Content provided for informational purposes only. Fortunately, you can purchase a new waterproof adhesive kit that is specifically designed for iPhone models if necessary. This layer protects the inner electrical components of your device. If your iPhone is waterproof, chances are that it has a special sealant around the edge of the backing. Remove the backing and safely store the screws for later installation.Turn in a counter-clockwise motion until loose.Line up the 5-Point Pentalobe driver in the head of the screws.Locate the two star-shaped screws at the bottom of your device.Allow the back to fall off naturally on to a soft surface to prevent damage. Doing so can cause cracks and other damage to the case. While removing the back casing, be sure not to bend it or force it off or on. Taking the back of your phone off is easy with the right know-how. How do you remove and replace the back of an iPhone? It can also be used on any remaining Philip screws you may need to remove from your device. A Philip's 00 driver is recommended for the two small screws that are used to connect the battery to the backing. If you are attempting to install a new battery in your iPhone, you will need a different size in addition to the 5-Point Pentalobe model. Do you need other screwdrivers to replace a battery in an iPhone? This tool is inserted into the screws and turned in a counter-clockwise motion to loosen them. The casing is held in place with small star-shaped screws found at the bottom of the device. This Pentalobe screwdriver is the only tool that should be used to remove the back casing. If you are trying to remove the plastic back casing of an iPhone 4S, you will need a 5-Point Pentalobe screwdriver specifically to complete the job. What size screwdriver can remove the back screws? Different components require varying types of screwdrivers making it important to know all of the sizes you need ahead of time, so you can plan accordingly. It is important to keep in mind that Apple products do not use one size of screwdriver alone. Whether you need to replace a specific component or are trying to install a brand-new battery, you need to use the right screwdriver for your iPhone 4S in order to avoid damaging the device. Finding the Right Cell Phone Screwdrivers for iPhone 4s
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