A grubscrew is almost always driven with an internal-wrenching drive, such as a hex socket (Allen), star (Torx), square socket (Robertson), or slot. All the head types are available in Stainless steel (A2). They are also available in 45h, which means its hard steel.
45h/A2 – 913
45h/A2 – 914
45h/A2 – 915
45h/A2 – 916
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