blacksideblue t1_iu4v2ep wrote on October 28, 2022 at 3:48 PM

Reply to comment by AlePhiCri in How can I remove a headless screw from a shower valve? by foootrest

To add to this, if its a really small/narrow bolt head: cut a cross for a Philips head screwdriver. If that fails it still acts as a guide for a left handed screw bit.

Agouti t1_iucg928 wrote on October 30, 2022 at 7:34 AM

To add to this, use a posidrive screwdriver, not a Phillips - Phillips are designed to cam out to prevent over-torque (so limit how much purchase you can get). Get a cheap one with a solid handle and hit the end with a hammer while you apply torque to the screw. It can also help to use a small drill bit to slightly recess the middle where the two slots meet (look at a normal screw head for inspiration).