The PRIMATECH A800 ergonomic extension handle allows to operate the nailers at ahigher or lower position. It can be easily set and locked at any position, thus. Compatible with Primatech models : 300 and 330 manual nailers, 210 pneumatic nailers manufactured since 2000, all pneumatic 240 nailers or 220 & 260 staplers, all pneumatic 245 nailers and staplers and all Primpact 250 and 550 pneumatic tools.