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The KLEIN TOOLS 633-4-INS is a No. 1 Phillips insulated screwdriver built for electricians and other trade professionals working on or near energized equipment. The blade is 4 inches long with a round shank, and the two-layer molded insulation is rated to 1000 volts in compliance with ASTM F1505 and IEC 60900. The cushion-grip plastic handle measures 4 inches in length and is designed to improve torque transfer while maintaining a secure grip during installation and service work. The blade is manufactured from custom US-made tool steel for durability under repeated use.
This screwdriver is suited for residential and commercial electrical work where insulated hand tools are required by code or job-site safety standards. Typical applications include panel work, low-voltage control wiring, motor control centers, and any fastener-driving task near live circuits up to 1000 volts. It is intended for use by licensed electricians and qualified electrical trades professionals following applicable NFPA 70E and OSHA electrical safety protocols.
Designed as an OEM-style insulated hand tool compatible with No. 1 Phillips fasteners in electrical, panel, and control-wiring applications requiring 1000V-rated insulated screwdrivers.
Installation and service work involving insulated screwdrivers near energized circuits must be performed by qualified electrical trade professionals in accordance with NFPA 70E safe work practices and applicable local codes. Always verify the insulation is free of cuts, nicks, or damage before use near live conductors. De-energize and lock out equipment whenever possible before beginning fastener work. Do not use this tool as a pry bar or chisel, as damage to the insulation layer will void its voltage rating.
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