The Schlage Plymouth handle set with Plymouth in matte black professional grade 1 security deadbolt lifetime limited mechanical and finish patented through bolt slides up and down so do not have to patch or redrill the door. F-Series handlesets are furnished with 7/8 wrought brass cylinder trim rings. The cylinder trim rings are reinforced by a tapered die-cast security insert installed under the trim ring for resistance to wrenching or prying the cylinder unit.