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Use the screw size that fits the cylinder and job conditions
Try the rake profiles after you understand how the lock responds to tension
Can beginners use it
and repeat while keeping each blank labelled so you can learn from the changes
Use for controlled triple-peak raking
Dangerfield 'J-Tool' Reach-Through Door Thumbturn Opening Tool star Use the screw size thatFree UK delivery over 30 Royal Mail options 30 day easy returns European delivery available Reach through J tool A J tool for authorised thumbturn reach through work The Dangerfield J Tool is a reach through door tool for suitable double door gaps and internal thumbturn operation. It is a locksmith tool for authorised non destructive entry where the door and lock layout allow the method. J toolshape Thumbturnroute Doorbypass 9. 99GBP 5 5 verified