Quick Answer:The Four Finger Clamp holds large or heavy glassware such as condensers, large flasks and Soxhlet extractors in four padded fingers that cradle the glass, tightened by dual thumb-screws for even, centred pressure.
Last updated: 18 October 2026
Key Features
Four-finger grip wraps around the glass and spreads pressure more evenly than a two-prong clamp, reducing the risk of stress fractures.
Fingers move in pairs, so irregular shapes and slightly tapered necks can be held.
Four-point grip stops glassware turning in the clamp when it is joined to rigid glass joints.
Dual thumb-screws centre the glassware symmetrically.
Thick padding insulates the glass from the metal body of the clamp.
Technical Specifications
Specification
Value
Fingers
Four, moving in pairs
Adjustment
Dual thumb-screws
Stem
Stainless steel rod, 8–10 mm diameter
Sleeves
Padded, for continuous use near heat sources
How It Is Used
Mounted on a retort stand with a boss head, the clamp supports condensers, large flasks and extractors in distillation and synthesis set-ups. The glassware is placed between the fingers and the thumb-screws are tightened until it is held evenly from both sides.
Frequently Asked Questions
What glassware is the Four Finger Clamp designed to hold?
Large or heavy items such as condensers, large flasks and Soxhlet extractors.
Why use the Four Finger Clamp instead of a two-prong clamp?
Its four fingers cradle the glass, spreading pressure more evenly and stopping the glassware from turning in the clamp.
