Big Timber CTX144 T 25#14 x 4" Construction Lag Screw Knurled Shank Type 17, Bronze, (500per Pack) Interstate Pneumatic Patent pending design with good The 1502WM SSA is Patent pending design with good ergonomics Rubber comfort grip ensures a non slip handling and reduces vibrations and fatigue Limited recoil resulting from balanced weight distribution Tool less jam clearing mechanism provides an easy access to the nose if the staple jams Multi directional exhaust adjusts without tools Includes a switchable trigger with sequential fire and bump fire Depth control dial for precise countersinking Light Weight at just under 5 Pounds Compatible with Doodle Scrub EBG 9 cut cleanly and easily sharp threads provide maximum holding power