Fast-fix internal corner clamp
Internal corners are often the slower part of a profile setup — there’s less room to wrap a traditional clamp around the work. The nail-on internal clamp solves that by fixing directly into the perp joint: tap the concrete nail home, engage the profile, move on.
How it works
- Position the clamp at the internal corner
- Tap the included concrete nail through the fixing hole into the perp joint or mortar bed
- Engage the profile — held true and plumb in seconds
Specifications
- Dimensions: 210mm × 25mm × 45mm
- Concrete nail included
- Securely fastened insert and domed washer
- Zinc-plated for corrosion resistance
- 12-month warranty
External version also available (GCN). Proudly Australian-made and owned. Part of BT Engineering’s complete bricklaying profile system.














Need either more nails and maybe a non slip pad on the round bit that contacts the profile stop it walking.
Absolutely love this tool.
Simple to use either nail into the perps or bed joints to clamp the profile.
Again more fantastic equipment by BT. I’ve used other brands in the past which have been quite poor quality. I’ve learnt from my mistakes and will only buy BT products from now on .