Guide to clamps & vices

October 16, 2018

Different types of hand clamps & which ones suit what kind of project.

selection of clamps - spring, conker, F clamp, ratchet clamp and a vice
Author: Muddy Faces

Age Range: all ages

Duration: less than an hour

Location: anywhere

Time Of Day: any time

Season: any

Tags: clamps, drill, guide, tools, workbench

Category: tool use & traditional crafts

Introduction – what is a clamp?

A clamp (sometimes referred to as a cramp) is a device that applies pressure to hold objects tightly in place onto a work surface, or to hold objects together.
This guide gives a brief description of different types of hand clamps and gives you an idea of which clamp to choose depending on your project.

A variety of clamps are available and used for many different purposes; in woodwork most are used as a temporary measure. Visit our clamp & vices section to see all the different clamps that we sell in our shop.

Spring clamp

Spring clamps tend to be small and are useful when working with smaller, delicate workpieces such as wooden discs. They can be used to hold small objects onto a work surface but are also very useful for holding two pieces together that are being glued.

Spring clamps have two jaws, two handles and a sprung pivot. Despite their small size they can apply a lot of pressure. They also require quite a bit of pressure to open so younger children will need support to use these clamps.

Spring clamps have plastic or rubber pads to protect the workpiece.

spring clamps

Ratchet clamp

This is a clamp with a ratchet mechanism and one-finger quick release.

The ratchet mechanism allows for a stronger grip than a spring clamp.

ratchet clamp


G-clamps are useful in woodwork projects. They have a fixed frame holding a threaded rod which attaches to a flat end/swivel shoe. The clamp is tightened by turning a T-handle attached to the rod.

The fixed frame means these clamps have a limited range (25-150mm) and a smaller jaw size compared to F-clamps.

Your choice of clamp will depend upon the size of your workpiece and workbench. The jaw size will be written in the product description.

The gripping surface of the frame and screw/swivel edge may cause indentations/marks in the wood you are working with. To avoid this use a scrap piece of wood as a protective layer between the clamp and the workpiece.

three sizes of G clamp


F-clamps work in a similar way to G-clamps except that the frame is not fixed. One arm of the frame slides along a bar to give a far greater clamping range (up to 600mm) without requiring a longer threaded rod. The jaw size will be written in the product description.

On tightening, the sliding arm is securely held in place, as it torques onto ridges running along the bar.

The F-clamp is also tightened with a T-handle and, like the G-clamp, you will need to protect your workpiece from indentations using scrap wood.

A variation of the F-clamp is the Rapid Bar Clamp. It differs in that you must depress a button to move the sliding arm, and tighten it by squeezing a handle

F clamp

Conker clamp

This is a hand-held clamp suitable for small items like conkers and acorns. The clamp allows you to hold the item safely using one hand whilst using a softwood hand drill or palm drill to make a hole.

Once the item is secured, rest the clamp on the work surface – hold the clamp with one hand and drill vertically down with the other.

Conker In Conker Clamp