The sockets are also knurled to help your grip in tight spaces. 21pc 1/4" Dr. Bit Sockets: FD4, FD5.5, FD7, PH1, PH2, PH3, HW3, HW4, HW5, HW6, HW7, HW8, T10, T15, T20, T25, T30, T40, PZ1, PZ2, PZ3. 13pc 1/4" Dr. Sockets: 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm.
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