Home Extension bar Socket extension bar ELORA 770-L 1/2 inch square drive, five lengths

Extension bar

Socket extension bar ELORA 770-L 1/2 inch square drive, five lengths

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Imported from: Germany

Origin: Made in Germany

Reaching bolts deep inside an engine bay calls for an extension between ratchet and socket. The ELORA 770-L bar carries a 1/2 inch square drive, equal to 12.5 mm. Chrome-Vanadium 31CrV3 steel forms the one-piece body. Square ends follow DIN 3120 and ISO 1174, with a ball detent holding the socket. Chrome plating covers the surface; the drive ends are polished.

SKU: 770-L

5 variants

€12.73 - €31.70

Stock status: Varies by SKU

Indicative price

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Description

The 1/2 inch socket extension bar sits between a ratchet and a socket, adding reach toward recessed bolts. ELORA builds the 770-L series around a square drive of 1/2 inch, equal to 12.5 mm. The shank is machined from Chrome-Vanadium 31CrV3 / 1.2208 steel in one piece. There is no intermediate joint along the body.

One end forms a square socket that accepts a ratchet or a speeder handle. The opposite end is a square drive tang that enters the socket. A ball detent holds the socket against accidental release. The square geometry follows DIN 3120 and ISO 1174, while bar dimensions follow DIN 3123 and ISO 3316. The ELORA catalogue lists five lengths in this family, from short bars for tight bays to long bars for deeply hidden fasteners. Each reference is packed in units of 6 pieces.

1/2 inch socket extension bar ELORA 770-L construction

Material and surface finish

Chrome-Vanadium 31CrV3 / 1.2208 is the ELORA steel grade used for torque transmission accessories. The chrome plating limits rust and makes wiping away oil or grease straightforward after repair work. Polished square ends give a smooth contact face when the tang enters a socket. Because the body is machined in one piece, load passes along the shank without a joint.

Steel grade: Chrome-Vanadium 31CrV3 / 1.2208
Chrome-plated surface, polished square ends
One-piece shank, no intermediate joint
Square drive size 1/2 inch, equal to 12.5 mm
Supplied in packs of 6 pieces per reference

The plated finish also helps you pick the bar out of a crowded tool drawer. Under a vehicle or inside an engine bay, grime clings less to the chrome layer. Cleaning at the end of a shift takes less time. Wipe the bar dry before storage so the plating keeps its condition over long service.

Drive ends and applicable standards

The two ends carry separate roles. The female square receives the ratchet, speeder handle or T-bar. The male square tang carries the socket and keeps it in place through the ball detent. Detent style and locating hole are covered by DIN 3120 and ISO 1174. Bar dimensions follow DIN 3123 and ISO 3316, so parts interchange with other 1/2 inch accessories.

Square ends to DIN 3120 and ISO 1174
Ball detent retention with matching locating hole
Bar dimensions to DIN 3123 and ISO 3316
Female square end for ratchets and speeder handles
Male square tang for 1/2 inch sockets

Standard compliance means the bar mates with existing 1/2 inch socket sets from a workshop trolley. When selecting a length, pick the shortest bar that still reaches the fastener. A longer bar makes applied torque harder to control. Misalignment of the drive axis also grows as bar length increases, especially on hard-seized bolts.

Common applications

Workshops use 1/2 inch extension bars for car, truck and motorcycle repair, in particular when a bolt sits behind a pipe or bracket. In industrial maintenance, the bar reaches machine mounting bolts, flange fasteners and gearbox housing screws. Steel structure assembly shops use it to guide a socket into narrow gaps between members. Long versions suit fasteners located deep inside enclosed compartments where a ratchet cannot enter directly.

Choosing a length

The variant table on this page shows every available length together with the weight of each reference. Measure the distance from the outer access point to the head of the bolt before ordering. Keeping two or three different lengths in the same tool case covers most daily repair situations without extra adapters.

Specifications

Function: extension between ratchet and socket
Square drive: 1/2 inch (12.5 mm)
Material: Chrome-Vanadium steel 31CrV3 / 1.2208
One-piece machined shank, no intermediate joint
Female square end for ratchets, speeder handles, T-bars
Male square tang for 1/2 inch sockets
Ball detent retention with matching locating hole
Square ends to DIN 3120 and ISO 1174
Bar dimensions to DIN 3123 and ISO 3316
Surface: chrome plated, corrosion resistant
Drive ends polished for smooth engagement
Interchangeable with standard 1/2 inch socket accessories
Use: automotive, truck and motorcycle repair
Use: industrial maintenance, flange and gearbox fasteners
Access to recessed fasteners behind pipes or brackets
Packing: 6 pieces per reference

Tags / Keywords: socket extension bar , 1/2 inch extension bar , socket accessories 1/2 inch , ratchet extension bar , chrome vanadium extension bar , extension bar DIN 3123 , car repair hand tools , industrial maintenance socket tools , long socket extension , square drive extension bar

Price list & Ordering

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	SKU Code	Price (EUR)	Overall length	Weight
⋮⋮	770-L35	€12.73	50mm	90g
⋮⋮	770-L4	€14.04	75mm	125g
⋮⋮	770-L5	€15.21	125mm	190g
⋮⋮	770-L6	€20.71	250mm	325g
⋮⋮	770-L66	€31.70	500mm	910g