Patent-pending pin system guarantees your deadbolts will slide perfectly into place every time * Eliminate deadbolt sticking caused by shifting foundations, settling doorframes, swelling doors * Two 3-1/2" steel screws and pin system housing extend into studs - strengthening the doorjamb * Strike plate is much larger than standard and made of steel * No more wrestling with hard-to-turn deadbolts - ideal for seniors or anyone with strength issues