Precision screwdriver allows you towork in tight spaces or with screws requiring a precision bit. The screwdriver shaft is extendible an additional 2 d" making this unique tool extremely flexible. The shaft locks in both the closed or extended position in any incremental length. Comes complete with 6 double-ended bits, a total of 12 precision bits. 5 bits store in the handle and are easily accessible. Convenient pen clip. The shaft is extendible in any increment up to an additional 2 d" (60mm). 5 bits store inside the transparent handle. The Precision Extendible 12-in-1 Screwdriver Set is a very versatile tool that will come in handy anywhere a precision screwdriver is needed. With the extendible shaft and 12 precision bits, the Precision Extendible Screwdriver is a must for every tool box and carries a 100% satisfaction guaranty for 1 full year.