Adapt any 1/4-Inch square wrench opening to 3/16-Inch and 5/16-Inch hex head sizes. This spring loaded ball bearing adapter locks securely into wrench. Fits Klein Refrigeration Wrenches 86938 and 68310 and provides an easy ratcheting action for hard to reach valves. Perfect for heating, AC, and refrigeration applications. Made in the USA.Features Black oxide coating Adapter fits 1/4-Inch square wrench opening Made in USA Hex Key provides access to 3/16-Inch and 5/16-Inch hard to reach valves Spring loaded ball bearing locks securely into wrench Perfect for heating, AC, and refrigeration applications Fits with Klein Refrigeration Wrenches 86938 and 68310 for easy ratcheting action Spring Loaded Type: Adapter for Refrigeration Wrench used in HVAC Hex Size: 3/16 in and 5/16 in Application: Valve Access - 3/16 in and 5/16 in Hex Adapter Connector Type: Spring Loaded Ball Bearing Overall Length: 2.125 in (5.4 cm) Depth: 2.120 in Width: 0.355 in Height: 0.235 in Diameter: 0.313 in (0.8 cm) Weight: 0.380 lbs Shank Size: 0.25 in (0.6 cm) Shank Type: Square Material: Steel Finish: Black Oxide Measurement Standard: SAE Country of Origin: United States DownloadsVideo DownloadSpec Sheet