Klein Tools BLS9M Color Coded Extra-Long L Style Hex Key Caddy Set, Metric, 9-Piece

The BLS9M carries nine metric L-style keys: 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm and 10 mm. All metric, no SAE sizes in this one, so if your fasteners are inch-series you need the SAE version instead.

Yes. Every key in the BLS9M has a ball end, which lets you drive a fastener at up to 25 degrees off axis. That plus the extra-long arms (30 percent longer than standard) is what gets you into set screws behind a pulley, in a panel, or down a recessed bore. Use the short straight end when you need full torque, since ball ends are for access, not muscle.

No. These are not insulated and will not protect against electrical shock, despite being catalogued for electrical trades. De-energize and verify before you work. If you need shock protection you want a dedicated insulated tool, not this caddy set.

Key lengths run from 4.5 inches on the 1.5 mm up to 8.78 inches on the largest (11.4 to 22.3 cm). That reach is the point of the set: it clears obstructions and gives you more leverage on the long leg. Do not slip a pipe over an arm to get more leverage, and wear eye protection when you lean on one.

The keys ride in a folding caddy that closes up to 9.28 x 3.85 x 1.27 inches (23.6 x 9.8 x 3.2 cm) and weighs 1.36 lbs total. The caddy also interlocks with other Klein extra-long hex key sets, so the metric and inch caddies stack together as one block in a bag.

L-style keys like the BLS9M give you two working ends and a long arm for reach and leverage, and you can use them one-handed deep inside a fixture. A folding tool keeps everything captive on one handle but limits how far you can get into a recess. Because the BLS9M arms run up to 8.78 inches and the keys pull free of the caddy individually, it is the better pick when access is tight or the fastener sits well below the surface.

Each key wears a color-coded plastic sleeve, so you grab by color instead of squinting at a stamp. The round shank under that sleeve is also easier on the hand than a bare bar during long jobs, and the orange caddy itself is easy to spot in a bag.

Every key is steel with a black phosphate coating for rust resistance, and the whole set is heat-treated and tempered. Phosphate is a decent barrier against humidity and handling, not a sealant, so wipe them down if they get soaked.

BLS9M is the Klein Tools part number, and it is the metric, 9-piece, ball-end, color-coded extra-long L-style caddy set. Order by that number and you get the caddy and all nine keys together.