A bowlers arm lets a player deliver a bowl with an assistive device rather than a conventional low hand release. It can help someone continue enjoying the game when bending or gripping has become difficult. Good fit and the correct competition rules matter.
Try one before buying
Ask a club coach or experienced arm bowler to demonstrate an approved model. Different lengths and release mechanisms feel different. Test whether you can set the bowl with the correct bias, make a comfortable swing and release without dropping the bowl onto the surface.
Build a repeatable action
Start with a medium jack and gentle draw. Use a consistent stance and let the device release along the intended line. Keep notes on short, long and sideways misses. A bowlers arm changes the mechanics, so allow time to rebuild weight control rather than judging it after four deliveries.
Competition approval varies
Bowls Australia publishes an approved bowlers-arm list for Australian competitions and describes the licensing route for pennant and higher events. Other countries and events can have different rules. Check your national authority and current conditions of play before entering with a particular device.
Make the club environment workable
An arm bowler may also need an accessible route to the rink, help with collecting bowls or a way to handle the mat and jack. Ask the player which adjustments are useful. The aim is a fair, comfortable session and a process everyone understands.
Sources: Bowls Australia approved bowlers arms, Bowls Victoria arm guide.
For a clearer look at a close club head, explore WGTS on iPhone or Android. Follow your competition's official measuring procedure for the result.