10mm (0.39"), 12mm (0.47"), 13mm (0.51"), 14mm (0.55"), 15mm (0.59"), 17mm (0.67"), 19mm (0.75"), 21mm (0.83"), 22mm (0.86"), 24mm (0.94"). Deep design reaches recessed fasteners (e.g., car engine bolts) that shallow sockets can’t access.
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