Best current price£6.49from eBay
Shopping.co.uk recommended and popular offers
eBay£6.49Visit shop Rolson 300mm (12inch) Combination Square Adjustment Level 50858
Visit shop
Amazon£9.34Visit shop Rolson Multi-Colour 50858 300Mm Combination Square
Visit shop6 offers from £6.49 - £9.34
View price history by clicking the chart icon.
The Rolson 300mm Combination Square (50858) is a versatile precision tool essential for carpenters, metalworkers, and DIY enthusiasts who require accurate marking and measuring. It offers the key benefit of combining multiple measuring instruments into one durable unit, including a bubble level and a scribe; however, users should note that as a budget-friendly tool, it may require initial calibration checks against a known square to ensure maximum precision for fine cabinetry work.
| Model Part Number | 50858 |
|---|---|
| Brand | Rolson |
Yes, the stainless steel ruler features clear, engraved metric and imperial markings for versatility.
Yes, by unscrewing the brass knurled knob completely, you can slide the head off to use the ruler independently.
The ruler is 300mm (approximately 12 inches) in length.
The integrated bubble level is suitable for general checking and leveling tasks, though it should not be used as a replacement for a precision spirit level.
The scribe is typically held within the head assembly; you can pull it out to mark lines and push it back in for storage.
Clean the blade and the inner groove of the head with a dry cloth to remove metal shavings or sawdust; lightly lubricate with machine oil if needed.
Loosen the brass knob and ensure there is no debris between the ruler and the head. If the error persists, the square head may have been dropped and may require replacement.
Check the thread of the brass knob for debris; ensure the metal is not cross-threaded during tightening.
To maintain accuracy, keep the square away from high-impact drops that could bend the steel blade or displace the bubble level vial. Before starting a critical project, verify the square's 90-degree setting by drawing a line against the square, flipping it over, and ensuring the new line perfectly overlaps the first. If the ruler becomes stiff when sliding, a light application of silicone spray or machine oil on the internal track of the head will restore smooth movement. Always store the tool in a dry environment to keep the stainless steel in peak condition and prevent the knurled knob from oxidizing.
