A hex key has a six-sided end for socket head screws and is sized in millimetres or inches across the flats. A TX-STAR key has a six-point star tip for star recess screws and is sized by T number, such as T10, T20 or T27. The two are not interchangeable, so check the screw head before choosing.
Security star screws have a pin in the centre of the recess, so a standard key will not go in. Security keys have a hole in the tip to clear the pin. On this page single security keys carry a T suffix, such as T10T, T20T and T25T, and a 9 piece long set runs from T10H to T50H.
It depends on the fasteners. Metric socket screws take metric keys, and inch-series screws, found on older British and American machinery, take imperial keys. A key that is nearly the right size can round the socket. The page lists separate metric and imperial sets, plus combined metric and imperial sets of 25 pieces.
A ball end lets the key enter the socket at an angle, which is handy for running screws in and out where access is awkward. It has less contact than the plain end, so use the short plain end to break a tight screw loose and for final tightening. Ball-end sets here include a 9 piece long imperial set and 9 piece extra-long metric sets.
Many sets on this page hold 7 to 10 keys; a 9 piece long metric set, for example, covers 1.5mm to 10mm. Jumbo sets of 10 and 13 pieces are also listed, as are combined metric and imperial sets of 25 pieces and 27 piece sets. Sets are kept together by a storage holder, a ring, a folding handle or a tool roll.
Single metric hexagon keys are listed from 1.5mm to 19mm, including in-between sizes such as 9mm and 11mm, with extra-long versions from 2mm. Single TX-STAR keys include T10 and T20, security keys such as T10T and T25T, and T-handle keys from T9 to T27. Singles suit replacing a lost or worn key from a set.
Hex & Draper TX-STAR® Keys
This category covers hexagon keys and Draper TX-STAR® keys for socket head and star recess fasteners. The Hexagon Keys page lists individual metric keys and key sets, including ball-end, long arm, extra-long, lock-on and T-handle designs. The Draper TX-STAR® Key Sets page covers standard and security star keys, folding sets and combined star and hex sets, and Sealey TRX-Star key sets are also listed in the category.
Brands include Draper and Sealey. Ball-end keys can engage the fastener at an angle, which helps where access is awkward, while T-handle keys give more grip and reach for repeated use. Check the size range of a set against the fasteners you work on, such as 1.5mm to 10mm, and choose security star keys for fixings with a centre pin.
A hex key has a six-sided end for socket head screws and is sized in millimetres or inches across the flats. A TX-STAR key has a six-point star tip for star recess screws and is sized by T number, such as T10, T20 or T27. The two are not interchangeable, so check the screw head before choosing.
Security star screws have a pin in the centre of the recess, so a standard key will not go in. Security keys have a hole in the tip to clear the pin. On this page single security keys carry a T suffix, such as T10T, T20T and T25T, and a 9 piece long set runs from T10H to T50H.
It depends on the fasteners. Metric socket screws take metric keys, and inch-series screws, found on older British and American machinery, take imperial keys. A key that is nearly the right size can round the socket. The page lists separate metric and imperial sets, plus combined metric and imperial sets of 25 pieces.
A ball end lets the key enter the socket at an angle, which is handy for running screws in and out where access is awkward. It has less contact than the plain end, so use the short plain end to break a tight screw loose and for final tightening. Ball-end sets here include a 9 piece long imperial set and 9 piece extra-long metric sets.
Many sets on this page hold 7 to 10 keys; a 9 piece long metric set, for example, covers 1.5mm to 10mm. Jumbo sets of 10 and 13 pieces are also listed, as are combined metric and imperial sets of 25 pieces and 27 piece sets. Sets are kept together by a storage holder, a ring, a folding handle or a tool roll.
Single metric hexagon keys are listed from 1.5mm to 19mm, including in-between sizes such as 9mm and 11mm, with extra-long versions from 2mm. Single TX-STAR keys include T10 and T20, security keys such as T10T and T25T, and T-handle keys from T9 to T27. Singles suit replacing a lost or worn key from a set.
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