Craftsman 3 Pc. Universal joint set 9-4250, 1/4, 3/8 & 1/2 in. Drive Get to all of your nuts and bolts in those tight spaces with your Craftsman 3-pc universal joint set Universal joints are each 3/8 inch Flexible heavy-duty steel tools for professional quality work yet light enough to do the job easily Get the job done in half the time using the right tools to get at your nuts and bolts Backed by Craftsman's Lifetime Guarantee