Spring Clamps: Choose Opening and Clamping Force | Saniso

A spring clamp holds parts with spring pressure: squeeze the handles to open the jaws, release to clamp. It is built for quick, temporary holds while you glue, join or position small workpieces.

At Saniso the STALCO and STALCO PERFECT lines under STALCO spring clamps cover ten main models: openings from 25 mm to 100 mm and clamping forces from 1.5 kg to 15 kg, as sets or singles. Saniso B.V. in Zwaag sells the STALCO / STALCO PERFECT brand as a wholesaler and webshop.

Prices below are a snapshot (2026-09-23 CEST, incl. and excl. 21% VAT). Always check the live product page.

What is a spring clamp?

It is a hand clamp whose force comes from a spring, not from a screw spindle. You open it with one squeeze and let go to hold the workpiece. Choice on Saniso here is mainly opening, clamping force, and set versus single — not carpenter’s clamps, C-clamps, or the reinforced/deep spring-clamp titles outside this list of ten.

Why use spring clamps for gluing and holding parts?

You use spring clamps for gluing, joining and holding elements in place when you need a fast, temporary grip. Hobby STALCO models are aimed at light glue spots and kit work; STALCO PERFECT models add reinforced construction and one-hand operation for woodworking holds, including clamping glued elements. The widest opening in this guide is 100 mm (S-76548) with 15 kg clamping force.

Who typically uses these clamps?

Hobbyists and DIY woodworkers who glue or hold small parts, and professionals who need one-hand spring clamps for woodworking — matching how the STALCO hobby and STALCO PERFECT product pages describe the lines.

Opening width: 25 mm to 100 mm

Match opening to the widest part you need to grip. The “25 mm”, “38 mm” and “50MM” words in titles are line labels; the width / opening figure in the title is the span that matters.

• Compact (25 mm): small glue edges or light kit parts — S-76582, 25 mm set of 8 and S-76580 (same opening and 1.5 kg force; title lists pack of 20 pcs while the description still says set of 8 pieces).
• Mid (38–75 mm, STALCO 38 mm line): drawer lips, trim or mid-size panels — from S-76584, 38 mm / 4.5 kg up to S-76590, 75 mm / 15 kg.
• Wide (50–100 mm, STALCO PERFECT): wider woodworking holds — up to S-76548, 100 mm / 15 kg.

Clamping force: 1.5 kg to 15 kg

Force rises with opening within each line up to a 15 kg ceiling on the larger singles. The kg figure on the product title is the stated clamping force.

Sets versus single clamps

• Sets (25 mm): S-76582 is a set of 8 pieces in a pack of 8 pcs with a convenient storage box. S-76580 uses the same 25 mm / 1.5 kg specs; its title says set of 8 pieces pack of 20 pcs, while the feature text still says set of 8 pieces — both wordings appear on the live page.
• Singles: STALCO 38 mm and STALCO PERFECT 50MM models are sold one clamp at a time, with openings from 38 mm to 100 mm.

Choose a set when you need several light clamps at once; choose a single when one larger opening or higher force is enough.

Which size fits which job

Overview of the ten STALCO spring clamps

Browse the full leaf category under STALCO spring clamps.

Frequently asked questions

When is a spring clamp better than a carpenter’s clamp?

Pick a spring clamp for a quick, light temporary hold on a small span. A carpenter’s clamp (long bar and screw) suits wide glue-ups and higher adjustable force — see our carpenter’s clamps guide for that range.

How do you choose opening width for a glue job?

Measure the thickest part you need to grip, then choose a clamp whose title opening is at least that wide. Ignore the “38 mm” or “50MM” line label if the opening figure next to it is different.

Which clamping force is enough for hobby work?

The 25 mm STALCO sets state 1.5 kg and are described for hobby gluing and holding. Mid STALCO singles run from 4.5 kg (S-76584) up to 15 kg on the larger openings.

Do you need a set of spring clamps or one larger clamp?

A set helps when several light points must stay closed at once (S-76582 / S-76580). One larger single is enough when a single wider jaw or higher force covers the job (for example S-76590 or S-76546).

What is the difference between a light hobby clamp and a reinforced spring clamp line?

STALCO 25 mm and 38 mm pages describe hobby use; STALCO PERFECT 50MM pages add reinforced construction, one-hand operation and woodworking / professional framing. Reinforced and deep spring-clamp titles outside these ten article codes are out of scope here.

Contact: Saniso B.V., De Corantijn 95, 1689 AN Zwaag · +31 85 488 5920 · Contact.