Craftsman 10 Piece Metric Crowfoot Wrench Set, 9-4363 The Craftsman 10-piece crow foot heads included are 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm and 19mm The crowfoot wrench heads fit with 3/8-in. square drive tools Set includes vinyl storage pouch Backed by Craftsman's Lifetime Guarantee