Snap resistance is the property that gets tested in practice
A euro cylinder is the part of a door lock that gets attacked, and the attack is almost always the same: the barrel is gripped and snapped at its weakest cross-section. Cylinders that address this carry a sacrificial front section designed to break away and leave the mechanism intact, plus hardened pins against drilling. Manufacturers state resistance as an EN 1303 grade, which is a declared figure rather than a measurement made here. The other half of the job is length: a cylinder protruding past the handle plate is the one that gets gripped. No cylinder in this hub describes snap or drill protection, and only one states testing to EN 1303, with no grade. So we compare the standard cited where there is one, keys and code cards, keyed-alike sets, and sizing.
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
40/50 mm (1.97 in) · usable in either orientation · anti-pick pins · emergency function · 5 keys
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.
Best for: A thicker door, or one where the 30/30 measured short.
≈ $72
30/30 with inside thumbturn · Titalium · 6 keys · for doors opened without a key inside
The thumbturn version of the TEC440: a knob on the inside instead of a keyway, so the door opens from within without a key. Same Titalium body and six reversible keys.
Best for: A front door that should always open from inside without hunting for a key — which is most front doors.
30/40 mm (1.57 in) · Titalium body, anodized · emergency function · 6 reversible keys · code card
ToniTec's TEC440, made by ABUS, in a Titalium alloy with an anodized finish for corrosion resistance. Six reversible keys, an emergency function, and a code card for reordering.
Best for: An exposed door — coastal, north-facing, or a garage side door where corrosion ends cylinders.
A RIM AND MORTISE cylinder, not a euro profile one · 1-1/4 in (32 mm) overall · solid brass, stated as "copper (solid brass)" · DIMPLE keyway with 2.5 mm (0.10 in) key thickness, the only keyway type named on this shelf · five keys · the maker itself says to compare the dimensions in the images before buying · no EN 1303 grade, no anti-snap, no anti-drill
A rim and mortise cylinder rather than a euro one — with a dimple keyway, five keys, and a maker who tells you to check the size first.
Best for: Replacing the cylinder in an existing rim or mortise lock on a wooden, aluminum, storm or patio door
≈ $31
60 mm (2.36 in) in a 30/30 split — the only split dimension published on this shelf, and the figure this shelf's buying tip asks for · 100,000-cycle durability rating · spool pins against picking, a hardened steel insert against drilling · "premium copper", glossed nowhere · NO EN 1303 grade and NO anti-snap section
The one euro cylinder here that gives its split dimension — and it says nothing about snapping, which is the attack this shelf is built around.
Best for: A wooden or aluminum door already measured at 30/30, where picking and drilling are the concern
≈ $27
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.
The number of keys supplied decides how many occupants are equipped without copying. On a protected cylinder, copying is controlled and expensive.
Cylinder length is a strict dimension. Too long, it protrudes and offers a grip; too short, it does not work.
A cylinder sold as reinforced with no reference to a standard commits nobody on its resistance. In this hub, the BASI V55 pair is the only one stated as “tested to EN 1303:2015”, with no grade code; the GERCAR set claims grade 2 “on the essential points”, with no certificate; the rest cite no standard.
Two dimensions either side of the fixing screw, measured separately. A cylinder is not always symmetrical: 30/30, 30/40, 40/50.
As little as possible: a few millimeters of protrusion are enough to offer a grip. A cylinder guard compensates for unavoidable protrusion.
A document that governs the copying of keys. Without it, a locksmith cannot duplicate, which is the point.
You never know how many keys are in circulation. It is a basic and inexpensive precaution.
No: it protects against picking and against the cylinder being pulled out. A hollow door or a weak frame gives way elsewhere.
They express a measured resistance to various attacks by an independent body. That is more reliable than a manufacturer's own scale.
Yes, if the cylinders are keyed alike. The simplest way is to buy them as a set — the BASI V55 pair, the GERCAR trio; otherwise, the code card lets you order another cylinder on the same key.
It is a simple operation on a standard lock: one screw, and the cylinder comes out with the key engaged. The difficulty is measuring correctly.
Measure the two dimensions separately either side of the screw: a cylinder is not always symmetrical. It should barely protrude — a few millimeters are enough to offer a grip — and an excellent cylinder on a hollow door changes nothing.
There is no table here, and the reason is in the listings. The figure published most often across these 8 products is keys, given by 6 of them — short of the four in five a column needs to compare rather than to display gaps. Each product page says what its own maker published.
Specifications: manufacturer sheets for home security products and the matching Amazon product pages. Prices and availability: Keepa.
Most recent revision in this category: October 8, 2026.
