We did open by saying we welcome comments whatever they may be! - there are a couple of reasons
1) Our new Screwdriver handle is extremely efficient in delivering torque - much more so than our old model (up to 60% more)
2) We had added grip tip features to help avoid cam-out. This was laser applied and which actually had a slight effect on the metallurgy of the tip
Our screwdrivers in this state still deliver up to 35% more torque than the ISO standard requires but the combined effect was ultimately to allow some of you to overpower them.
We have now removed the laser markings and have further increased the torque capability.
We do continue to monitor the performance and will respond positively to genuine deficiencies.
As with all things, there are design and engineering compromises - you need to ensure tight connections, so need good torque output, however, if a tip is too hard, it will resist wear better but is more brittle - too soft and it will wear quickly or twist, so our task has been to hit the best balance.
Having said all this, abuse will still break any screwdriver, so it is important you do use the right type of tip for the screw head and don't use them as levers, chisels, plasterboard punches etc etc!
CK Tools