1-3/8" 18-Gauge 7/32" Narrow Crown Finish Staple Power-packed engine design drives nails up to 6-1/4 In. Oil-free engine requires no lubrication. Includes auxiliary handle for added comfort Drives 21° Plastic Collated Framing Nails. Bostitch 1-3/8" 18-Gauge 7/32" Narrow Crown Finish Staple