Spax Extra Long Flat Head Partial thread screws (2 1/2" of thread on all sizes). T30 torx drive. Yellow zinc plating for rust resistance. Great for attaching rain gutters to facia boards and other applications requiring strength and durability in an extra long fastener. The contractor box packaging was discontinued in 2020 (I still have limited supply in the sizes listed). The only length available in this series going forward will be the #14x4" in a 1000pc pail.