Recessed edges. Socket openings are designed to reduce fastener rounding.
Performance Tool W1388 10 Piece Metric Hex Bit Socket Set
Performance Tool W36300 10 Piece 1/4in. Drive 6pt Deep Sae Socket Set
Performance Tool W36002 10 Piece 1/4in. Drive 6pt Sae Socket Set
Performance Tool W38300 10 Piece 3/8in. Drive Sae Deep Socket Set
