Snap resistance is the property that gets tested in practice · review
The same D6XNP cylinder in 40/50, for a thicker door or a door with a heavier handle set. ABUS states it can be fitted in either orientation, with the same emergency function, pins and code card.
The conclusion The same cylinder for a thicker door. The only decision is which half goes where, and it is the short one outside.
This is the D6XNP in 40/50 — 90 mm (1.97 to 3.54 in) overall — for doors the 60 mm (2.36 in) version cannot span. Mechanically it is identical to its shorter sibling: the same pins, the same emergency function, the same five reversible keys.
Which half goes outside. ABUS states the cylinder fits either way round, and that is genuinely useful when a door is not what the survey said. It is also where the mistake happens: the 50 mm (1.97 in) half belongs inside the door, and the 40 mm (1.57 in) half outside.
A cylinder projecting 10 or 15 mm (0.59 in) past an outside handle plate is a cylinder somebody can get a tool onto. Fitting it backwards is a five-minute job that undoes the reason for the purchase.
It is worth saying plainly, because the instinct is the opposite. Cylinder length describes the door, not the security. The correct cylinder is the one that finishes flush on both faces, and a longer one on a thinner door is actively worse than the cheap one it replaced.
Because the door is between sizes and the next size down is too short, a security escutcheon over the outside face covers the exposed millimeters. That is a real solution, and it is what cylinder guards are for.
A thicker door, measured before ordering.
On sale at $71 on the American Amazon store at the time of checking.
Prices and availability are what Keepa reported on the date this page was updated; both move.
Prices quoted in this text were read on September 2, 2026. The live price is at the top of the page.
Weighed against the median of its own range on this site — not against the security market at large.
| Length | 40 mm (1.57 in) / 50 mm (1.97 in), stated by ABUS |
|---|---|
| Orientation | Usable either way round |
| Security features | Special pins for pick and manipulation resistance |
| Emergency function | Operable with a key in the opposite side |
| Keys | 5 reversible |
| Amazon reference | B00ID3LXRK |
| EAN | 4003318483042 |
The shorter half outside, always. ABUS states the cylinder can be fitted either way, which is a convenience and also a trap: the long half belongs inside the door. A cylinder with 50 mm (1.97 in) projecting past an outside handle plate is a cylinder that can be gripped.
No. Longer is for thicker doors, and nothing else. Buying a longer cylinder than the door needs makes the lock less secure, not more, because the excess sticks out somewhere. The right cylinder is the one that finishes flush.
As little as possible, and ideally none — flush with the handle plate or slightly behind it. If a cylinder must protrude, a security escutcheon covering it is the accessory that addresses the gap.
7.8/ 10
The same cylinder for a thicker door. The only decision is which half goes where, and it is the short one outside.
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.
Details checked on September 2, 2026.
A thicker door, or one where the 30/30 measured short.
Specifications: the manufacturer sheet for home security products and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
30/30 mm (1.18 in) · anti-pick pins · emergency function · 5 reversible keys · code card
ABUS's everyday euro cylinder: special pins for pick and manipulation resistance, an emergency function that works with a key in the other side, and five reversible keys with a code card for reordering.
Best for: Replacing a builder's cylinder on a front door, at the smallest sensible price.
≈ $54
Two 30/30 cylinders keyed alike · 10 keys · emergency function · tested to EN 1303:2015
Two cylinders that take the same key, with ten keys between them. BASI states the V55 range is tested to EN 1303:2015 and supplied direct from the manufacturer, with an emergency function on both.
Best for: A front and back door, or a house and a garage, that should share one key.
Three 30/30 cylinders keyed alike · solid brass, matt nickel · 15 keys · 5 and 8 cm (3.1 in) screws
Three keyed-alike cylinders in solid brass with a matt nickel finish, and fifteen keys between them. GERCAR states stock keying, which is what makes a three-cylinder set affordable, and supplies both 50 and 80 mm (3.15 in) fixing screws.
Best for: A house with three doors — front, back and garage — that should all take one key.
