Britool Hallmark Difficult Access Master Socket Set - 3/8" & 1/2" Drive

This professional window socket set is specifically designed for working on hard-to-reach fasteners where standard sockets or spanners cannot be used. The windowed socket design allows access over pipes and wiring, making it ideal for automotive applications such as removing and installing sensors, thermo switches, ABS units, master cylinders, and diesel injection pipes. Perfect for working on brake lines, fuel systems, and other confined areas, these sockets provide a secure grip on nuts and bolts positioned on or around bent or obstructed pipework. The open-sided “window” design enables the socket to slide over pipes while still allowing full engagement with the fastener, reducing the risk of rounding. Manufactured from high-quality heat-treated chrome vanadium steel, this set offers excellent strength, durability, and long service life in demanding workshop environments. Designed for use with standard ratchets and extension bars, it delivers reliable torque transfer even in restricted access situations. Contents: 3/8" Square Drive: 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm 1/2" Square Drive: 15mm, 16mm, 17mm, 18mm, 19mm, 21mm, 22mm Supplied in a robust storage case for easy organisation, transport, and quick size selection. Key Features: Difficult access socket set with window design for use over pipes and wiring Ideal for brake, fuel, and hydraulic system work Suitable for sensors, ABS units, master cylinders, and injection pipes Heat-treated chrome vanadium steel for strength and durability Compatible with standard ratchets and extension bars Supplied in a durable carry case