4Pcs 1/4 3/8 1/2 Impact Socket Adapter Converter Reducer Air Impact Craftsman Socket Wrench Adapter Hand Tool Kit BI115 +Description:4pcs Converter SetThis kit allows you to mix and match drive sizes for sockets, ratchet handles, extension cords and other accessories. Ideal tool for mechanics, engineers, carpenters or DIY enthusiastsSpring Loaded Ball Bearing RetainerSpecification:Size:1/2" to 3/8" - (12.5mm square hole to 9.5mm square head) length: 36mm3/8" to 1/4" - (9.5mm square hole to 6.3mm square head) length: 26mm3/8" to 1/2" - (9.5mm square hole to 12.5mm square head) length: 35mm1/4" to 3/8" - (6.3mm square hole to 9.5mm square head) length: 25mm Height: About 25mm, 26mm, 35mm, 36mm Hardness: 60HRC Made of Chrome Vanadium Stainless Steel 4pc Ratchet Socket Adapter Reducer Converter Tool Kit 1/4" 3/8" 1/2"