diff --git a/fat-bits/src/bpb.rs b/fat-bits/src/bpb.rs
index 26e4223..362346c 100644
--- a/fat-bits/src/bpb.rs
+++ b/fat-bits/src/bpb.rs
@@ -236,6 +236,7 @@ impl Bpb {
         if self.fat_type() == FatType::Fat32 {
             return None;
         }
+
         Some(self.fat_offset() + self.sector_to_offset(self.num_fats() as u32 * self.fat_size()))
     }
 
diff --git a/fat-bits/src/lib.rs b/fat-bits/src/lib.rs
index f17275c..5db4130 100644
--- a/fat-bits/src/lib.rs
+++ b/fat-bits/src/lib.rs
@@ -98,8 +98,15 @@ pub struct FatFs {
     fat: fat::Fat,
 }
 
+unsafe impl Send for FatFs {}
+
 impl FatFs {
-    pub fn load(data: Rc<RefCell<dyn SliceLike>>) -> anyhow::Result<FatFs> {
+    pub fn load<S>(data: S) -> anyhow::Result<FatFs>
+    where
+        S: SliceLike + Send + 'static,
+    {
+        let data = Rc::new(RefCell::new(data));
+
         let mut bpb_bytes = [0; 512];
 
         data.borrow_mut().read_at_offset(0, &mut bpb_bytes)?;
diff --git a/fat-dump/src/main.rs b/fat-dump/src/main.rs
index 2ddc569..39e16ff 100644
--- a/fat-dump/src/main.rs
+++ b/fat-dump/src/main.rs
@@ -22,7 +22,7 @@ pub fn main() -> anyhow::Result<()> {
 
     // println!("{}", bpb);
 
-    let fat_fs = FatFs::load(Rc::new(RefCell::new(file)))?;
+    let fat_fs = FatFs::load(file)?;
 
     println!("{}", fat_fs.bpb());
     println!();
diff --git a/fat-fuse/src/lib.rs b/fat-fuse/src/lib.rs
index e3a77c3..309e0e0 100644
--- a/fat-fuse/src/lib.rs
+++ b/fat-fuse/src/lib.rs
@@ -26,7 +26,10 @@ pub struct FatFuse {
 }
 
 impl FatFuse {
-    pub fn new(data: Rc<RefCell<dyn SliceLike>>) -> anyhow::Result<FatFuse> {
+    pub fn new<S>(data: S) -> anyhow::Result<FatFuse>
+    where
+        S: SliceLike + Send + 'static,
+    {
         let uid = unsafe { libc::getuid() };
         let gid = unsafe { libc::getgid() };
 
diff --git a/fat-mount/src/main.rs b/fat-mount/src/main.rs
index f9ea244..d1e5bef 100644
--- a/fat-mount/src/main.rs
+++ b/fat-mount/src/main.rs
@@ -15,7 +15,7 @@ fn main() -> anyhow::Result<()> {
 
     let file = File::open(path)?;
 
-    let fat_fuse = FatFuse::new(Rc::new(RefCell::new(file)))?;
+    let fat_fuse = FatFuse::new(file)?;
 
     let options = vec![
         MountOption::RO,