Mechanical Keyless Entry Door Lock, 2.0 Code Upgrade, 4-7 Digits Code, Single-Sided Push Button Combination Mechanical Keypad Door Knob, Auto Locking,

About these itemsMechanical keyless locks: These are mechanical keyless entry door locks designed for both indoor and outdoor use. They come in single - side and double - side configurations, offering different access control options.Upgraded keypad: The 2.0 mechanical lock keypad allows for code updates directly through the handle and keypad without removing the lock. The C key enables quick input clearing. Some models have fixed - sequence entry for enhanced security.Battery - free security: All locks operate without batteries or wiring, supporting 4 - 7 digit codes (or 5 - digit in one model) using numbers and X/Z letters. Any - order or fixed - sequence entry options provide security against code guessing.Door compatibility: They come with 4 spindles (or cuttable spindle in one case) to fit 1.4" - 2.5" door thicknesses and 2 latch sizes for different door depths. The locks can be mounted on left - hand and right - hand doors and are compatible with metal fence and wooden doors.Durable build: Constructed with sturdy zinc - alloy (or aluminum - alloy in one model) and a rust - resistant (or rust - proof) coating, they can withstand various weather conditions and frequent use.Key DifferencesAccess side: OL - 601D3 - 01, OL - 209D3 - BK - 07, OL - 5051D - BK - 03, and OL - 601QD3 - 03 are single - sided locks, while OL - 601S3 - 07, OL - 209S3 - BK - 07, and OL - 4056S3 - 01 are double - sided. Double - sided locks offer dual - sided code control for better access management.Code entry type: Most models support 4 - 7 digit codes with any - order entry, but OL - 5051D - BK - 03 has a 5 - digit combination with a fixed input sequence.Material and weight: OL - 4056S3 - 01 is made of aluminum alloy, while the rest are zinc - alloy. This also leads to differences in unit weight, with OL - 601D3 - 01 and OL - 209D3 - BK - 07 weighing 3 lbs, OL - 601S3 - 07 weighing 3.75 lbs, OL - 209S3 - BK - 07 weighing 3.84 lbs, OL - 4056S3 - 01 weighing 3.73 lbs, OL - 5051D - BK - 03 weighing 3.81 lbs, and OL - 601QD3 - 03 weighing 3.33 lbs.Special features: OL - 601D3 - 01, OL - 601QD3 - 03 have two access modes (hold - open and code - free), OL - 209D3 - BK - 07 has code - free entry for outdoor convenience, and OL - 5051D - BK - 03's fixed - sequence entry is for simple outdoor security.SpecificationsOL - 601D3 - 01:Item Model Number: OL - 601D3 - 01Color: BlackCode Digits: 4 - 7 Digit Combination (Numbers & X/Z, No Repeats)Suitable Door Thickness: 1.4" - 2.5" / 35 - 65 mmMain Material: Zinc AlloyUnit Weight: 3 lbs / 1.36 kgOL - 209D3 - BK - 07:Item Model Number: OL - 209D3 - BK - 07Color: Oil - Rubbed BronzeCode Digits: 4 - 7 Digit Combination (Numbers & X/Z, No Repeats)Suitable Door Thickness: 1.4" - 2.5" / 35 - 65 mmMain Material: Zinc AlloyUnit Weight: 3 lbs / 1.36 kgOL - 601S3 - 07:Item Model Number: OL - 601S3 - 07Color: Oil - Rubbed BronzeCode Digits: 4 - 7 Digit Combination (Numbers & X/Z, No Repeats)Suitable Door Thickness: 1.4" - 2.5" / 35 - 65 mmMain Material: Zinc AlloyUnit Weight: 3.75 lbs / 1.7 kgOL - 209S3 - BK - 07:Item Model Number: OL - 209S3 - BK - 07Color: Oil - Rubbed BronzeCode Digits: 4 - 7 Digit Combination (Numbers & X/Z, No Repeats)Suitable Door Thickness: 1.4" - 2.5" / 35 - 65 mmMain Material: Zinc AlloyUnit Weight: 3.84 lbs / 1.74 kgOL - 4056S3 - 01:Item Model Number: OL - 4056S3 - 01Color: BlackCode Digits: 4 - 7 Digit Combination (Numbers & X/Z, No Repeats)Suitable Door Thickness: 1.4" - 2.5" / 35 - 65 mmMain Material: Aluminum AlloyUnit Weight: 3.73 lbs / 1.69 kgOL - 5051D - BK - 03:Item Model Number: OL - 5051D - BK - 03Color: SliverCode Digits: 5 - Digit CombinationSuitable Door Thickness: 1.4" - 2.5" / 35 - 65 mmMain Material: Zinc AlloyUnit Weight: 3.81 lbs / 1.73 kgOL - 601QD3 - 03:Item Model Number: OL - 601QD3 - 03Color: SliverCode Digits: 4 - 7 Digit Combination (Numbers & X/Z, No Repeats)Suitable Door Thickness: 1.4" - 2.5" / 35 - 65 mmMain Material: Zinc AlloyUnit Weight: 3.33 lbs / 1.51 kgPackage ContentFor each model:1 x Mechanical Keyless Entry Door Lock1 x User Manual