NU-SET 2120-3 Jimmy Proof Style Inter Locking Deadbolt Lock with Single Cylinder, Bronze 2 Hardened steel interlocking throw bolt for pry-resistant Hidden tamper-resistant shutter guard against force entry if cylinder is removed Zinc alloy die casting steel casing resists tempering and weathering Large thumb turn inside for easy locking and unlocking Fits door thickness between 1-3/8-Inch to 2-3/8-Inch