Ryobi
Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw
$119Cheaper
Best Circular Saws · head-to-head
Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw vs Skilsaw SPT77WML-01 15-Amp 7-1/4 in. Lightweight Magnesium Worm Drive Circular Saw
A sourced, side-by-side comparison. Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw is cheaper at $119. Every spec and price links to its source.
Skilsaw
Skilsaw SPT77WML-01 15-Amp 7-1/4 in. Lightweight Magnesium Worm Drive Circular Saw
$219.99
Released 2013
Which is better: the Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw or Skilsaw SPT77WML-01 15-Amp 7-1/4 in. Lightweight Magnesium Worm Drive Circular Saw?
On the specs we track, they're closely matched. The Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw is the cheaper at $119.
See Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw on Amazon See Skilsaw SPT77WML-01 15-Amp 7-1/4 in. Lightweight Magnesium Worm Drive Circular Saw on Amazon
As an Amazon Associate we earn from qualifying purchases. Prices verified at capture; live price may differ.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw | Skilsaw SPT77WML-01 15-Amp 7-1/4 in. Lightweight Magnesium Worm Drive Circular Saw |
|---|---|---|
| US price | $119 | $219.99 |
| Brand | Ryobi | Skilsaw |
| Released | — | 2013 |
| Power source | cordless | corded |
| Blade size (in) | 7-1/4 in | 7-1/4 in |
| Voltage or amps | 18 V | 15 A |
| Max (rpm) | 3800 | 5300 |
| Bevel capacity (°) | 56 deg | 53 deg |
| Brushless | Yes | No |
| Weight (lb) | 6.6 lb | 11.5 lb |
| Release | — | 2013 |
Sources — Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw: homedepot.com (verified 2026-06-20). Skilsaw SPT77WML-01 15-Amp 7-1/4 in. Lightweight Magnesium Worm Drive Circular Saw: skil.com (verified 2026-06-20).
What's the difference between the Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw and Skilsaw SPT77WML-01 15-Amp 7-1/4 in. Lightweight Magnesium Worm Drive Circular Saw?
Where the two actually differ on the specs we track (6 of 7). Matching specs are omitted.
- Power source: Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw cordless vs Skilsaw SPT77WML-01 15-Amp 7-1/4 in. Lightweight Magnesium Worm Drive Circular Saw corded
- Voltage or amps: Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw 18 V vs Skilsaw SPT77WML-01 15-Amp 7-1/4 in. Lightweight Magnesium Worm Drive Circular Saw 15 A
- Max (rpm): Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw 3800 vs Skilsaw SPT77WML-01 15-Amp 7-1/4 in. Lightweight Magnesium Worm Drive Circular Saw 5300
- Bevel capacity (°): Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw 56 deg vs Skilsaw SPT77WML-01 15-Amp 7-1/4 in. Lightweight Magnesium Worm Drive Circular Saw 53 deg
- Brushless: Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw true vs Skilsaw SPT77WML-01 15-Amp 7-1/4 in. Lightweight Magnesium Worm Drive Circular Saw false
- Weight (lb): Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw 6.6 lb vs Skilsaw SPT77WML-01 15-Amp 7-1/4 in. Lightweight Magnesium Worm Drive Circular Saw 11.5 lb
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw
Only one whitelisted source covers the exact P508: a 2017 pre-launch preview from Pro Tool Reviews, not a hands-on lab test, so no measured results exist. It praises the brushless motor and 26% larger 7-1/4-inch cut capacity as clear upgrades, but flags the doubled price and still-missing rafter hook. (1 sourced review.)
Praised: Brushless motor upgrade for longer runtime, more power, and longer motor life; 26% larger cut capacity from the full-size 7-1/4-inch blade (up from 6-1/2-inch); LED cut-line light, dust blower, and left-mount blade improve cut-line visibility.
Flagged: Price roughly doubles that of the previous P507 model; Still lacks a rafter hook; Left-mount blade is less convenient for left-handed users.
Skilsaw SPT77WML-01 15-Amp 7-1/4 in. Lightweight Magnesium Worm Drive Circular Saw
Only one whitelisted tester—Pro Tool Reviews—had accessible review prose for this exact model, naming the Skilsaw SPT77WML its best corded worm-drive circular saw for its 77-series 15-amp power and lightweight magnesium build. No other whitelisted source with accessible measurements was available, so no cross-source comparison exists. (1 sourced review.)
Praised: Named Pro Tool Reviews' best corded worm drive circular saw; 77-series 15-amp motor delivers ample wood-cutting power; All-magnesium housing (motor, shoe, gear housing) keeps it lightweight (~11.5 lb without blade) for a worm drive.
Flagged: Premium price positioning ($199, or $219 for twist-lock cord).