These .27 calibre safety load strips hold 10 charges and are for use with the IF-100 Powder Actuated tool and suit a wide range of other brands of tools. Being the Winchester brand is your guarantee of high quality, safe and reliable charges. These strips are suitable for use across a wide range of other brands of low velocity .27 calibre Powder Actuated tools. Available in three different strength power loads Green for Low Load, Yellow for Medium Load and Red for High Load.