Stanley 66-166-A Slotted Screwdriver 5/16 in Blade

Product Description

The STANLEY 66-166-A is a standard slotted screwdriver built for everyday fastening tasks in mechanical, electrical, and general trade work. The blade measures 5/16 inches wide and 6 inches long, with an overall length of 11 inches for added reach in confined spaces. The round shank connects to an acetate handle, which provides a firm grip and resists common shop solvents. This screwdriver suits licensed trades and experienced DIYers who need a reliable, full-size flathead driver for terminal screws, panel fasteners, and general service applications.

This screwdriver is appropriate for residential and light commercial service work. Electricians reach for it when seating slotted terminal screws in panels and junction boxes. HVAC technicians use it for access panel fasteners and equipment covers. Plumbers use it on slotted fixture screws and supply line fittings. The 11-inch overall length gives enough leverage for stubborn fasteners without sacrificing control on close-quarter work. The acetate handle is compatible with standard hand-tool use and is not rated for insulated electrical work unless separately certified.

Key Features

• 5/16-inch blade width fits standard slotted fasteners across multiple trades
• 6-inch blade length provides reach into recessed fastener locations
• 11-inch overall length delivers leverage for seated or stubborn fasteners
• Round shank allows a wrench to be applied for extra torque when needed
• Acetate handle offers solvent resistance and a secure grip during use
• Standard tip and tool type suited for general trade and service applications

Compatibility

Designed as a general-purpose slotted screwdriver for use with standard slotted fasteners encountered in HVAC, electrical, plumbing, and general mechanical service work.

Installation Notes

Inspect the blade tip before use — a worn or chipped tip will slip and damage fastener heads. Match the blade width closely to the fastener slot to avoid cam-out. This tool is not rated for use on energized electrical components unless it carries a recognized insulated-tool certification. Store in a dry location to prevent handle degradation over time.