Constructed from superior quality carbon steel wire for optimum performance. Shaped with finely honed chisel points for maximum penetration. Designed with 1/4” (6mm) leg length to drive through 2-25 sheets. Optimized 1/4” (6mm) leg length to drive through 2-25 sheets. 5,000 staples per box. (Also available in 1,000 count box). For use in heavy duty staplers: Bostitch 00540, B310HDS, 03201 and other branded heavy duty staplers.