National Nail 00093172 Hardcut Masonry Nail 50 lbHardened steel with blunt point and tapered shank cause minimal spalling during penetration and offers even greater pull out resistance than wire masonry nails. Ideal for attaching wood members to cinder block walls as well as to fresh concrete. Highlights: Hardened Bright Size pw lgth in 10d 3 lgth Pkg size 50 lb WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth