
A spanner or socket should always be your first choice but these are all valid alternatives for badly mangled nuts, broken wing nuts etc.
-14%

Amazon.co.uk
5.0
£10.98 £12.86
IRWIN Q/G54122QC Quick-Grip Mini Clamp, 300mm, Pack of 2, Dark Blue/Black

Amazon.co.uk
4.0
£4.49
Pack of 6 Plastic Spring Grip Clamps 3 Inches Quick Grip Craft Wood Work Clamp

Amazon.co.uk
4.0
£9.99
8Pcs Clamps Set, 4 Inches Quick Grip Clamps and Heavy Duty Nylon Spring Clamps, Ratchet Bar Clamps F Clips One Handed Bar Clamps for Woodworking Fast and...