deksawyer
E*POWAH Master
LITELOK X3 or Hiplok D1000/DX1000. The weakest link then would be what you attach them to.
Pragmasis chains and anchors are worth a look as well.
None of the above are cheap, but when all your toys are stolen in the middle of the night, it hurts. I know.
LITELOK X3
DETAILS LITELOK X3 is armoured with Barronium®, a patent pending composite material that resists angle grinder attack by turning the grinder's energy and force in on itself. It offers at least 15 times more resistance than the best-selling D-locks without adding any extra weight. It is...
www.litelok.com
Hiplok D1000: Anti-Angle Grinder bike Lock | Hiplok
The Hiplok D1000 is sold secure Diamond and the first anti-angle grinder bike lock. Designed to stop angle grinder attacks,
hiplok.com
Hiplok DX1000: Anti-Angle Grinder Motorcycle D Lock | Hiplok
Motorcycle D Lock. 1000 Series - 1st Anti-Angle Grinder Motorcycle Lock. Sold secure Diamond & ENRA approved. Features Ferosafe. Independently Tested
hiplok.com
Pragmasis chains and anchors are worth a look as well.
Security Chains from SecurityForBikes, by Pragmasis
securityforbikes.com
None of the above are cheap, but when all your toys are stolen in the middle of the night, it hurts. I know.