spool pin

: a spool-shaped pin tumbler used in some cylinder locks to foil picking attempts

Useful english dictionary. 2012.

Look at other dictionaries:

  • spool pin —   n.    a pin with a uniform smaller diameter except at its ends. Typically a top pin used to augment pick resistance but also observed as bottom and master pins …   Locksmith dictionary

  • spool — I. noun Etymology: Middle English spole, from Middle Dutch spoele; akin to Old High German spuola spool Date: 14th century 1. a cylindrical device which has a rim or ridge at each end and an axial hole for a pin or spindle and on which material… …   New Collegiate Dictionary

  • dumbbell pin —   n.    a spool pin with serrations at the larger diameter ends …   Locksmith dictionary

  • mushroom pin — noun : spool pin …   Useful english dictionary

  • step pin —   n.    a spool or mushroom pin which has had a portion of its end machined to a smaller diameter than the opposite end. It is typically used as a top pin to improve pick resistance by some manufacturers of high security cylinders …   Locksmith dictionary

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